Teach UploadPack to take a provider of URIs corresponding to cached
packs. When fetching, if the client supports the packfile-uri feature,
and if such a cached pack were to be streamed, instead send the
corresponding URI.
This packfile-uri feature is implemented in the jt/fetch-cdn-offload
branch of Git. There is interest in this feature [1], but it is not yet
merged.
[1] https://public-inbox.org/git/cover.1552073690.git.jonathantanmy@google.com/
Change-Id: I9a32dae131c9c56ad2ff4a8a9638ae3b5e44dc15
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
* stable-5.4:
Fix NPE in RebaseTodoFile#parseComments
Fix NPE in ObjectIdOwnerMap#get
Fix NPE in CommitOnlyTest#getHead
FileUtils#lastModifiedInstant should not log error if path doesn't exist
Cache user global and system-wide git configurations
Avoid setup and saving FileStoreAttributes compete for ~/.gitconfig lock
Add missing dependencies for running FS_POSIXTest in Eclipse
Fix javadoc for SystemReader#getInstance
Upgrade tycho-extras to 1.4.0
Improve retry handling when saving FileStoreAttributes fails
Ensure FSTest uses MockSystemReader
Make supportsAtomicCreateNewFile return true as default
Update orbit to R20190602212107-2019-06 to enable backports from master
Handle InvalidPathException in FS_POSIX#createNewFileAtomic
Ensure root cause of lock creation failures is logged
Implement toString in MockSystemReader and MockConfig
LocalDiskRefTreeDatabaseTest shall use MockSystemReader
Ensure LocalDiskRepositoryTestCase#setup fully uses MockSystemReader
Ensure we use MockSystemReader in tests
Override FileBasedConfig's save method in MockConfig
Remove FileBasedConfig.load(boolean) introduced in d45219ba
Disable debug log for FS in org.eclipse.jgit.test
Bazel: enable logging for tests in org.eclipse.jgit.test
LockFile: log exception if creation of lock file failed
Stop using deprecated Constants.CHARACTER_ENCODING
Change-Id: I709de5edb626536529a99220aae7751b127c9bff
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.3:
Fix NPE in RebaseTodoFile#parseComments
Fix NPE in ObjectIdOwnerMap#get
Fix NPE in CommitOnlyTest#getHead
FileUtils#lastModifiedInstant should not log error if path doesn't exist
Cache user global and system-wide git configurations
Avoid setup and saving FileStoreAttributes compete for ~/.gitconfig lock
Add missing dependencies for running FS_POSIXTest in Eclipse
Fix javadoc for SystemReader#getInstance
Improve retry handling when saving FileStoreAttributes fails
Ensure FSTest uses MockSystemReader
Make supportsAtomicCreateNewFile return true as default
Update orbit to R20190602212107-2019-06 to enable backports from master
Handle InvalidPathException in FS_POSIX#createNewFileAtomic
Ensure root cause of lock creation failures is logged
Implement toString in MockSystemReader and MockConfig
LocalDiskRefTreeDatabaseTest shall use MockSystemReader
Ensure LocalDiskRepositoryTestCase#setup fully uses MockSystemReader
Ensure we use MockSystemReader in tests
Override FileBasedConfig's save method in MockConfig
Remove FileBasedConfig.load(boolean) introduced in d45219ba
Disable debug log for FS in org.eclipse.jgit.test
Bazel: enable logging for tests in org.eclipse.jgit.test
LockFile: log exception if creation of lock file failed
Stop using deprecated Constants.CHARACTER_ENCODING
Change-Id: I43c2ab8b44c3e87d48e4072907ad169c81e3ffe0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.2:
Fix NPE in RebaseTodoFile#parseComments
Fix NPE in ObjectIdOwnerMap#get
Fix NPE in CommitOnlyTest#getHead
FileUtils#lastModifiedInstant should not log error if path doesn't exist
Cache user global and system-wide git configurations
Avoid setup and saving FileStoreAttributes compete for ~/.gitconfig lock
Add missing dependencies for running FS_POSIXTest in Eclipse
Fix javadoc for SystemReader#getInstance
Improve retry handling when saving FileStoreAttributes fails
Ensure FSTest uses MockSystemReader
Make supportsAtomicCreateNewFile return true as default
Update orbit to R20190602212107-2019-06 to enable backports from master
Handle InvalidPathException in FS_POSIX#createNewFileAtomic
Ensure root cause of lock creation failures is logged
Implement toString in MockSystemReader and MockConfig
LocalDiskRefTreeDatabaseTest shall use MockSystemReader
Ensure LocalDiskRepositoryTestCase#setup fully uses MockSystemReader
Ensure we use MockSystemReader in tests
Override FileBasedConfig's save method in MockConfig
Remove FileBasedConfig.load(boolean) introduced in d45219ba
Disable debug log for FS in org.eclipse.jgit.test
Bazel: enable logging for tests in org.eclipse.jgit.test
LockFile: log exception if creation of lock file failed
Stop using deprecated Constants.CHARACTER_ENCODING
Change-Id: If0c5010a2cf151ebebb2f2088fac3ee02c5007b9
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.1:
Fix NPE in RebaseTodoFile#parseComments
Fix NPE in ObjectIdOwnerMap#get
Fix NPE in CommitOnlyTest#getHead
FileUtils#lastModifiedInstant should not log error if path doesn't exist
Cache user global and system-wide git configurations
Avoid setup and saving FileStoreAttributes compete for ~/.gitconfig lock
Add missing dependencies for running FS_POSIXTest in Eclipse
Fix javadoc for SystemReader#getInstance
Improve retry handling when saving FileStoreAttributes fails
Ensure FSTest uses MockSystemReader
Make supportsAtomicCreateNewFile return true as default
Update orbit to R20190602212107-2019-06 to enable backports from master
Handle InvalidPathException in FS_POSIX#createNewFileAtomic
Ensure root cause of lock creation failures is logged
Implement toString in MockSystemReader and MockConfig
LocalDiskRefTreeDatabaseTest shall use MockSystemReader
Ensure LocalDiskRepositoryTestCase#setup fully uses MockSystemReader
Ensure we use MockSystemReader in tests
Override FileBasedConfig's save method in MockConfig
Remove FileBasedConfig.load(boolean) introduced in d45219ba
Disable debug log for FS in org.eclipse.jgit.test
Bazel: enable logging for tests in org.eclipse.jgit.test
LockFile: log exception if creation of lock file failed
Stop using deprecated Constants.CHARACTER_ENCODING
Change-Id: I48c585f3c9287be7d6ddb6b01a1955444e13fa31
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Previously, the API did not enforce ordering of writes. Misuse of
this API would lead to data effectively being lost.
Guard against that with IllegalArgumentException, and add a test.
Change-Id: I04f55c481d60532fc64d35fa32c47037a03988ae
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Small reftables omit the log index. Currently,
ReftableWriter#shouldHaveIndex does this if there is a single-block
log, but other writers could decide on different criteria.
In the case that the log index is missing, we have to linearly search
for the right block. It is never appropriate to use binary search on
blocks for log data, as the blocks are compressed and therefore
irregularly sized.
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Change-Id: Id59874edf6bf45c7dec502d9465888e077ffe198
So far the git configuration and the system wide git configuration were
always reloaded when jgit accessed these global configuration files to
access global configuration options which are not in the context of a
single git repository. Cache these configurations in SystemReader and
only reload them if their file metadata observed using FileSnapshot
indicates a modification.
Change-Id: I092fe11a5d95f1c5799273cacfc7a415d0b7786c
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Thomas Wolf <thomas.wolf@paranor.ch>
Tests shall not modify ~/.gitconfig. When running tests with bazel this
test failed since bazel isolates tests in a sandbox.
Change-Id: I7dd092afd14972da58a95eb7c200d353f0959fa1
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
The method org.eclipse.jgit.util.FS.supportsAtomicCreateNewFile()
should default to true as mentioned in docs [1]
org.eclipse.jgit.util.FS_POSIX.supportsAtomicCreateNewFile() method
will set the value to false if the git config
core.supportsatomiccreatenewfile is not set.
It should default to true if the configuration is undefined.
[1]
4169a95a65/org.eclipse.jgit/src/org/eclipse/jgit/util/FS_POSIX.java (L372)
Bug: 544164
Change-Id: I16ccf989a89da2cf4975c200b3228b25ba4c0d55
Signed-off-by: Vishal Devgire <vishaldevgire@gmail.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
It missed to call the setup() method of its super class which prepares
the MockSystemReader
Change-Id: I39858749f8d0115fc6ac7edc8847ffb2bbc85c33
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
If we use the default system reader FileStoreAttributes cannot persist
attributes in userConfig when tests run in Bazel due to sandboxing.
Hence we need to ensure that all tests use MockSystemReader (and
especially a mocked userConfig).
Change-Id: Ic1ad8e2ec5a150c5433434a5f6667d6c4674c87d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This was enabled unintentionally in 06fc6c7c and spams the test logs. We
can enable this when needed.
Change-Id: I9f3042c0e285ff236be65fcc02bdcfdb90efc3af
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
- use slf4j-simple for logging in test runs
- for log configuration see
https://www.slf4j.org/api/org/slf4j/impl/SimpleLogger.html
Change-Id: I9f0a532644b31162c867cd0d63f083296eaf6be5
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.4: (82 commits)
Export all packages of o.e.j.ant and o.e.j.archive bundles
Do not require test bundles to export all packages
Fix API problem filters
Increase severity of AmbiguousMethodReference to ERROR
[error prone] suppress AmbiguousMethodReference in AnyLongObjectId
[error prone] fix ReferenceEquality warning in CommitBuilder
[error prone] suppress NonAtomicVolatileUpdate warning in SimpleLruCache
[error prone] fix ReferenceEquality warning in CommitGraphPane#authorFor
[error prone] fix ReferenceEquality warning in RevWalk#isMergedInto
[error prone] fix ReferenceEquality warning in RefUpdate#updateImpl
[error prone] fix ReferenceEquality warning in static equals methods
[error prone] suppress AmbiguousMethodReference in AnyObjectId
[error prone] fix "FutureReturnValueIgnored" error in FS
Fix formatting and add missing braces in Repository#stripWorkDir
Repository: fix reference comparison of Files
MergeAlgorithm: Suppress Error Prone warning about reference equality
Fix NarrowingCompoundAssignment warnings from Error Prone
FS_POSIX: handle Files.getFileStore() failures
Fix OpenSshConfigTest#config
FileSnapshot: fix bug with timestamp thresholding
In LockFile#waitForStatChange wait in units of file time resolution
Cache FileStoreAttributeCache per directory
Fix FileSnapshot#save(long) and FileSnapshot#save(Instant)
Persist minimal racy threshold and allow manual configuration
Measure minimum racy interval to auto-configure FileSnapshot
Reuse FileUtils to recursively delete files created by tests
Fix FileAttributeCache.toString()
Add test for racy git detection in FileSnapshot
Repeat RefDirectoryTest.testGetRef_DiscoversModifiedLoose 100 times
Fix org.eclipse.jdt.core.prefs of org.eclipse.jgit.junit
Add missing javadoc in org.eclipse.jgit.junit
Enhance RepeatRule to report number of failures at the end
Fix FileSnapshotTests for filesystem with high timestamp resolution
Retry deleting test files in FileBasedConfigTest
Measure filesystem timestamp resolution already in test setup
Refactor FileSnapshotTest to use NIO APIs
Measure stored timestamp resolution instead of time to touch file
Handle CancellationException in FileStoreAttributeCache
Fix FileSnapshot#saveNoConfig
Use Instant for smudge time in DirCache and DirCacheEntry
Use Instant instead of milliseconds for filesystem timestamp handling
Workaround SecurityException in FS#getFsTimestampResolution
Fix NPE in FS$FileStoreAttributeCache.getFsTimestampResolution
FS: ignore AccessDeniedException when measuring timestamp resolution
Add debug trace for FileSnapshot
Use FileChannel.open to touch file and set mtime to now
Persist filesystem timestamp resolution and allow manual configuration
Increase bazel timeout for long running tests
Bazel: Fix lint warning flagged by buildifier
Update bazlets to latest version
Bazel: Add missing dependencies for ArchiveCommandTest
Bazel: Remove FileTreeIteratorWithTimeControl from BUILD file
Add support for nanoseconds and microseconds for Config#getTimeUnit
Optionally measure filesystem timestamp resolution asynchronously
Delete unused FileTreeIteratorWithTimeControl
FileSnapshot#equals: consider UNKNOWN_SIZE
Timeout measuring file timestamp resolution after 2 seconds
Fix RacyGitTests#testRacyGitDetection
GlobalBundleCache: Fix ClassNewInstance warning from Error Prone
IncorrectObjectTypeException: Fix typos in constructors' Javadoc
Change RacyGitTests to create a racy git situation in a stable way
Deprecate Constants.CHARACTER_ENCODING in favor of StandardCharsets.UTF_8
Fix non-deterministic hash of archives created by ArchiveCommand
Update Maven plugins ecj, plexus, error-prone
Update Maven plugins and cleanup Maven warnings
Make inner classes static where possible
Error Prone: Increase severity of NonOverridingEquals to ERROR
Error Prone: Increase severity of ImmutableEnumChecker to ERROR
GitDateParser#ParseableSimpleDateFormat: Make formatStr private final
BatchRefUpdateTest: Suppress ImmutableEnumChecker warning
PacketLineIn: Suppress comparison warnings for END and DELIM
FileSnapshot#toString: Suppress ReferenceEquality warnings
Blame: Suppress ReferenceEquality warning for RevCommit instances
Fix API problem filters
pgm: add missing optional dependency to org.tukaani:xz
NetscapeCookieFile: Make hash static and group overloaded write
NetscapeCookieFile: Javadoc fixes
Config: Handle reference-equality warning (and empty javadoc)
Error Prone: Increase severity of ShortCircuitBoolean to ERROR
ObjectWalk: Prefer boolean operators over logical operators in comparisons
BasePackFetchConnection: Prefer boolean operators over logical operators in comparisons
PackWriter: Prefer boolean operators over logical operators in comparisons
Change-Id: I825fd55bcb5345fb7afe066bf54ca50325f40acb
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Configure PDE to not warn about not exported packages for test bundles.
Reusable test code which other bundles may want to reuse should go into
one of the junit bundles:
- org.eclipse.jgit.junit
- org.eclipse.jgit.junit.http
- org.eclipse.jgit.junit.ssh
Change-Id: Ifbdf30f8552e8f4bad6bbdeb63f729c53c844315
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Move the implementation of the static equals() method to a new method
and suppress the error. Deprecate the old method to signal that we
intend to remove it in the next major release.
See https://errorprone.info/bugpattern/AmbiguousMethodReference
Change-Id: I5e29c97f4db3e11770be589a6ccd785e2c9ac7f2
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Error Prone reports:
[NarrowingCompoundAssignment] Compound assignments from long to int
hide lossy casts
and
[NarrowingCompoundAssignment] Compound assignments from int to byte
hide lossy casts
See https://errorprone.info/bugpattern/NarrowingCompoundAssignment
Fix the warnings by adding explicit casts or changing types as
necessary.
Now that all occurrences of the warning are fixed, increase its
severity to ERROR.
Change-Id: Idb3670e6047b146ae37daee07212ff9455512623
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
* stable-5.3:
Fix OpenSshConfigTest#config
FileSnapshot: fix bug with timestamp thresholding
In LockFile#waitForStatChange wait in units of file time resolution
Cache FileStoreAttributeCache per directory
Fix FileSnapshot#save(long) and FileSnapshot#save(Instant)
Persist minimal racy threshold and allow manual configuration
Measure minimum racy interval to auto-configure FileSnapshot
Reuse FileUtils to recursively delete files created by tests
Fix FileAttributeCache.toString()
Add test for racy git detection in FileSnapshot
Repeat RefDirectoryTest.testGetRef_DiscoversModifiedLoose 100 times
Fix org.eclipse.jdt.core.prefs of org.eclipse.jgit.junit
Add missing javadoc in org.eclipse.jgit.junit
Enhance RepeatRule to report number of failures at the end
Fix FileSnapshotTests for filesystem with high timestamp resolution
Retry deleting test files in FileBasedConfigTest
Measure filesystem timestamp resolution already in test setup
Refactor FileSnapshotTest to use NIO APIs
Measure stored timestamp resolution instead of time to touch file
Handle CancellationException in FileStoreAttributeCache
Fix FileSnapshot#saveNoConfig
Use Instant for smudge time in DirCache and DirCacheEntry
Use Instant instead of milliseconds for filesystem timestamp handling
Workaround SecurityException in FS#getFsTimestampResolution
Fix NPE in FS$FileStoreAttributeCache.getFsTimestampResolution
FS: ignore AccessDeniedException when measuring timestamp resolution
Add debug trace for FileSnapshot
Use FileChannel.open to touch file and set mtime to now
Persist filesystem timestamp resolution and allow manual configuration
Increase bazel timeout for long running tests
Bazel: Fix lint warning flagged by buildifier
Update bazlets to latest version
Bazel: Add missing dependencies for ArchiveCommandTest
Bazel: Remove FileTreeIteratorWithTimeControl from BUILD file
Add support for nanoseconds and microseconds for Config#getTimeUnit
Optionally measure filesystem timestamp resolution asynchronously
Delete unused FileTreeIteratorWithTimeControl
FileSnapshot#equals: consider UNKNOWN_SIZE
Timeout measuring file timestamp resolution after 2 seconds
Fix RacyGitTests#testRacyGitDetection
Change RacyGitTests to create a racy git situation in a stable way
Deprecate Constants.CHARACTER_ENCODING in favor of StandardCharsets.UTF_8
Fix non-deterministic hash of archives created by ArchiveCommand
Update Maven plugins ecj, plexus, error-prone
Update Maven plugins and cleanup Maven warnings
Make inner classes static where possible
Fix API problem filters
Change-Id: Iec3ad6ccc194582cb844310dc172c3103dae4457
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.2:
Fix OpenSshConfigTest#config
FileSnapshot: fix bug with timestamp thresholding
In LockFile#waitForStatChange wait in units of file time resolution
Cache FileStoreAttributeCache per directory
Fix FileSnapshot#save(long) and FileSnapshot#save(Instant)
Persist minimal racy threshold and allow manual configuration
Measure minimum racy interval to auto-configure FileSnapshot
Reuse FileUtils to recursively delete files created by tests
Fix FileAttributeCache.toString()
Add test for racy git detection in FileSnapshot
Repeat RefDirectoryTest.testGetRef_DiscoversModifiedLoose 100 times
Fix org.eclipse.jdt.core.prefs of org.eclipse.jgit.junit
Add missing javadoc in org.eclipse.jgit.junit
Enhance RepeatRule to report number of failures at the end
Fix FileSnapshotTests for filesystem with high timestamp resolution
Retry deleting test files in FileBasedConfigTest
Measure filesystem timestamp resolution already in test setup
Refactor FileSnapshotTest to use NIO APIs
Measure stored timestamp resolution instead of time to touch file
Handle CancellationException in FileStoreAttributeCache
Fix FileSnapshot#saveNoConfig
Use Instant for smudge time in DirCache and DirCacheEntry
Use Instant instead of milliseconds for filesystem timestamp handling
Workaround SecurityException in FS#getFsTimestampResolution
Fix NPE in FS$FileStoreAttributeCache.getFsTimestampResolution
FS: ignore AccessDeniedException when measuring timestamp resolution
Add debug trace for FileSnapshot
Use FileChannel.open to touch file and set mtime to now
Persist filesystem timestamp resolution and allow manual configuration
Increase bazel timeout for long running tests
Bazel: Fix lint warning flagged by buildifier
Update bazlets to latest version
Bazel: Add missing dependencies for ArchiveCommandTest
Bazel: Remove FileTreeIteratorWithTimeControl from BUILD file
Add support for nanoseconds and microseconds for Config#getTimeUnit
Optionally measure filesystem timestamp resolution asynchronously
Delete unused FileTreeIteratorWithTimeControl
FileSnapshot#equals: consider UNKNOWN_SIZE
Timeout measuring file timestamp resolution after 2 seconds
Fix RacyGitTests#testRacyGitDetection
Change RacyGitTests to create a racy git situation in a stable way
Deprecate Constants.CHARACTER_ENCODING in favor of
StandardCharsets.UTF_8
Fix non-deterministic hash of archives created by ArchiveCommand
Update Maven plugins ecj, plexus, error-prone
Update Maven plugins and cleanup Maven warnings
Make inner classes static where possible
Fix API problem filters
Change-Id: I238adfd3080a5fed9d64c3c757297da6ea893918
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
* stable-5.1:
Fix OpenSshConfigTest#config
FileSnapshot: fix bug with timestamp thresholding
In LockFile#waitForStatChange wait in units of file time resolution
Cache FileStoreAttributeCache per directory
Fix FileSnapshot#save(long) and FileSnapshot#save(Instant)
Persist minimal racy threshold and allow manual configuration
Measure minimum racy interval to auto-configure FileSnapshot
Reuse FileUtils to recursively delete files created by tests
Fix FileAttributeCache.toString()
Add test for racy git detection in FileSnapshot
Repeat RefDirectoryTest.testGetRef_DiscoversModifiedLoose 100 times
Fix org.eclipse.jdt.core.prefs of org.eclipse.jgit.junit
Add missing javadoc in org.eclipse.jgit.junit
Enhance RepeatRule to report number of failures at the end
Fix FileSnapshotTests for filesystem with high timestamp resolution
Retry deleting test files in FileBasedConfigTest
Measure filesystem timestamp resolution already in test setup
Refactor FileSnapshotTest to use NIO APIs
Measure stored timestamp resolution instead of time to touch file
Handle CancellationException in FileStoreAttributeCache
Fix FileSnapshot#saveNoConfig
Use Instant for smudge time in DirCache and DirCacheEntry
Use Instant instead of milliseconds for filesystem timestamp handling
Workaround SecurityException in FS#getFsTimestampResolution
Fix NPE in FS$FileStoreAttributeCache.getFsTimestampResolution
FS: ignore AccessDeniedException when measuring timestamp resolution
Add debug trace for FileSnapshot
Use FileChannel.open to touch file and set mtime to now
Persist filesystem timestamp resolution and allow manual configuration
Increase bazel timeout for long running tests
Bazel: Fix lint warning flagged by buildifier
Update bazlets to latest version
Bazel: Add missing dependencies for ArchiveCommandTest
Bazel: Remove FileTreeIteratorWithTimeControl from BUILD file
Add support for nanoseconds and microseconds for Config#getTimeUnit
Optionally measure filesystem timestamp resolution asynchronously
Delete unused FileTreeIteratorWithTimeControl
FileSnapshot#equals: consider UNKNOWN_SIZE
Timeout measuring file timestamp resolution after 2 seconds
Fix RacyGitTests#testRacyGitDetection
Change RacyGitTests to create a racy git situation in a stable way
Deprecate Constants.CHARACTER_ENCODING in favor of StandardCharsets.UTF_8
Fix non-deterministic hash of archives created by ArchiveCommand
Update Maven plugins ecj, plexus, error-prone
Update Maven plugins and cleanup Maven warnings
Make inner classes static where possible
Fix API problem filters
Change-Id: Ia57385b2a60f48a5317c8d723721c235d7043a84
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
- use FS.DETECTED instead of db.getFS() since the ssh config is
typically in a different place than the repository, the same is used in
OpenSshConfig
- reduce unnecessary repeated writes by introducing wait for one tick of
the file time resolution
Change-Id: Ifac915e97ff420ec5cf8e2f162e351f9f51b6b14
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Increase the safety factor to 2.5x for extra safety if max of measured
timestamp resolution and measured minimal racy threshold is < 100ms, use
1.25 otherwise since for large filesystem resolution values the
influence of finite resolution of the system clock should be negligible.
Before, not yet using the newly introduced minRacyThreshold measurement,
the threshold was 1.1x FS resolution, and we could issue the
following sequence of events,
start
create-file
read-file (currentTime)
end
which had the following timestamps:
create-file 1564589081998
start 1564589082002
read 1564589082003
end 1564589082004
In this case, the difference between create-file and read is 5ms,
which exceeded the 4ms FS resolution, even though the events together
took just 2ms of runtime.
Reproduce with:
bazel test --runs_per_test=100 \
//org.eclipse.jgit.test:org_eclipse_jgit_internal_storage_file_FileSnapshotTest
The file system timestamp resolution is 4ms in this case.
This code assumes that the kernel and the JVM use the same clock that
is synchronized with the file system clock. This seems plausible,
given the resolution of System.currentTimeMillis() and the latency for
a gettimeofday system call (typically ~1us), but it would be good to
justify this with specifications.
Also cover a source of flakiness: if the test runs under extreme load,
then we could have
start
create-file
<long delay>
read
end
which would register as an unmodified file. Avoid this by skipping the
test if end-start is too big.
[msohn]:
- downported from master to stable-5.1
- skip test if resolution is below 10ms
- adjust safety factor to 1.25 for resolutions above 100ms
Change-Id: I87d2cf035e01c44b7ba8364c410a860aa8e312ef
Signed-off-by: Han-Wen Nienhuys <hanwen@google.com>
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Cache FileStoreAttributeCache entries since looking up FileStore for a
file may be expensive on some platforms.
Implement a simple LRU cache based on ConcurrentHashMap using a simple
long counter to order access to cache entries.
Change-Id: I4881fa938ad2f17712c05da857838073a2fc4ddb
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Signed-off-by: Marc Strapetz <marc.strapetz@syntevo.com>
Also-By: Marc Strapetz <marc.strapetz@syntevo.com>
To enable persisting the minimal racy threshold per FileStore add a
new config option to the user global git configuration:
- Config section is "filesystem"
- Config subsection is concatenation of
- Java vendor (system property "java.vendor")
- Java version (system property "java.version")
- FileStore's name, on Windows we use the attribute volume:vsn instead
since the name is not necessarily unique.
- separated by '|'
e.g.
"AdoptOpenJDK|1.8.0_212-b03|/dev/disk1s1"
The same prefix is used as for filesystem timestamp resolution, so
both values are stored in the same config section
- The config key for minmal racy threshold is "minRacyThreshold" as a
time value, supported time units are those supported by
DefaultTypedConfigGetter#getTimeUnit
- measure for 3 seconds to limit runtime which depends on hardware, OS
and Java version being used
If the minimal racy threshold is configured for a given FileStore the
configured value is used instead of measuring it.
When the minimal racy threshold was measured it is persisted in the user
global git configuration.
Rename FileStoreAttributeCache to FileStoreAttributes since this class
is now declared public in order to enable exposing all attributes in one
object.
Example:
[filesystem "AdoptOpenJDK|11.0.3|/dev/disk1s1"]
timestampResolution = 7000 nanoseconds
minRacyThreshold = 3440 microseconds
Change-Id: I22195e488453aae8d011b0a8e3276fe3d99deaea
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Also-By: Marc Strapetz <marc.strapetz@syntevo.com>
By running FileSnapshotTest#detectFileModified we found that the sum of
measured filesystem timestamp resolution and measured clock resolution
may yield a too small interval after a file has been modified which we
need to consider racily clean. In our tests we didn't find this behavior
on all systems we tested on, e.g. on MacOS using APFS and Java 8 and 11
this effect was not observed.
On Linux (SLES 15, kernel 4.12.14-150.22-default) we collected the
following test results using Java 8 and 11:
In 23-98% of 10000 test runs (depending on filesystem type and Java
version) the test failed, which means the effective interval which needs
to be considered racily clean after a file was modified is larger than
the measured file timestamp resolution.
"delta" is the observed interval after a file has been modified but
FileSnapshot did not yet detect the modification:
"resolution" is the measured sum of file timestamp resolution and clock
resolution seen in Java.
Java version filesystem failures resolution min delta max delta
1.8.0_212-b04 btrfs 98.6% 1 ms 3.6 ms 6.6 ms
1.8.0_212-b04 ext4 82.6% 3 ms 1.1 ms 4.1 ms
1.8.0_212-b04 xfs 23.8% 4 ms 3.7 ms 3.9 ms
1.8.0_212-b04 zfs 23.1% 3 ms 4.8 ms 5.0 ms
11.0.3+7 btrfs 98.1% 3 us 0.7 ms 4.7 ms
11.0.3+7 ext4 98.1% 6 us 0.7 ms 4.7 ms
11.0.3+7 xfs 98.5% 7 us 0.1 ms 8.0 ms
11.0.3+7 zfs 98.4% 7 us 0.7 ms 5.2 ms
Mac OS
1.8.0_212 APFS 0% 1 s
11.0.3+7 APFS 0% 6 us
The observed delta is not distributed according to a normal gaussian
distribution but rather random in the observed range between "min delta"
and "max delta".
Run this test after measuring file timestamp resolution in
FS.FileAttributeCache to auto-configure JGit since it's unclear what
mechanism is causing this effect.
In FileSnapshot#isRacyClean use the maximum of the measured timestamp
resolution and the measured "delta" as explained above to decide if a
given FileSnapshot is to be considered racily clean. Add a 30% safety
margin to ensure we are on the safe side.
Change-Id: I1c8bb59f6486f174b7bbdc63072777ddbe06694d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
These are useful to avoid typos, and also for tab completion.
Change-Id: I0f2d267e46b36bc40297c9657c447f3fd8b9f831
Signed-off-by: David Turner <dturner@twosigma.com>
In a subsequent patch, in some cases, PackWriter#writePack will be
responsible for both the "packfile-uris" and "packfile" sections,
meaning that (in these cases) it must write the "packfile" section
header itself.
In preparation for that patch, move the writing of the "packfile"
section header closer to the invocation of PackWriter#writePack when the
entire fetch response is configured to use the sideband. This means that
"packfile" is written *after* objects are counted (and progress messages
sent to the client in sideband 2) when the "sideband-all" feature is
used (whether "packfile-uris" is used or not), and written *before*
objects are counted otherwise.
Having code to write "packfile" in two places is unfortunate but
necessary. When "sideband-all" is not used, object counting has to
happen after "packfile" is written, because "packfile" activates the
sideband that allows counting progress to be transmitted. When
"packfile-uris" is used, object counting has to happen before "packfile"
is written, because object counting determines whether to send
"packfile-uris" or "packfile". When "sideband-all" is used but
"packfile-uris" is not used, either way works; this commit uses
"packfile-uris" behavior in this case.
Also make the naming of the sideband-activating methods in PacketLineOut
more consistent.
Change-Id: Ifbfd26cc26af10c41b77758168833702d6983df1
Signed-off-by: Jonathan Tan <jonathantanmy@google.com>
Repeat the test 10000 times to get statistics if measured
fsTimestampResolution is working in practice to detect racy git
situations.
Add a class to compute statistics for this test. Log delta between
lastModified and time when FileSnapshot failed to detect modification.
This happens if the racy git limit determined by measuring filesystem
timestamp resolution and clock resolution is too small. If it would be
correct FileSnapshot would always detect modification or mark it
modified if time since modification is smaller than the racy git limit.
Change-Id: Iabe7af1a7211ca58480f8902d4fa4e366932fc77
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
The newly introduced ProtocolV2HookChain is implemented using lists
instead of arrays.
Update PostUploadHookChain to keep the hook chains implementation
consistent.
Change-Id: I5ae0c923f117ac48558a989464f5d5d868d81f76
Signed-off-by: Ivan Frade <ifrade@google.com>
The newly introduced ProtocolV2HookChain is implemented using lists
instead of arrays.
Update PostUploadHookChain to keep hook chain implementations
consistent.
Change-Id: Ic5694feab943e8949896b93103dbf427716c9bd7
Signed-off-by: Ivan Frade <ifrade@google.com>
This should help to detect if measured fsTimeResolution is too small.
Change-Id: Id1f54dbdedb52b17859904e47776fa3a5887b8be
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
When filesystem timestamp resolution is very high some tests don't work
since runtime of the test setup is too long to reach a racily clean
FileSnapshot. Hence skip these tests when timestamp resolution is higher
than 10 millisecond.
Change-Id: Ie47dd10eda22037b5c1ebff6b6becce0654ea807
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
This helps to avoid some time critical tests can't prepare the test
fixture intended since measuring timestamp resolution takes time.
Change-Id: Ib34023e682a106070ca97e98ef16789a4dfb97b4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
- use Path instead of File
- create test directories, files and output stream using Files methods
- delete unused list "files"
Change-Id: I8c5c601eca9f613efb5618d33b262277df92a06a
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
UploadPack only supports one protocol-v2 hook. There are already cases
where more than one is needed.
Offer a Chain class to compose ProtocolV2Hooks, as other hooks do. It
looks like a single hook but it calls all its members.
Change-Id: Idd173ca7df6672079ac0de03c67f77abac376538
Signed-off-by: Ivan Frade <ifrade@google.com>
This enables higher file timestamp resolution on filesystems like ext4,
Mac APFS (1ns) or NTFS (100ns) providing high timestamp resolution on
filesystem level.
Note:
- on some OSes Java 8,9 truncate milliseconds, see
https://bugs.openjdk.java.net/browse/JDK-8177809, fixed in Java 10
- UnixFileAttributes truncates timestamp resolution to microseconds when
converting the internal representation to FileTime exposed in the API,
see https://bugs.openjdk.java.net/browse/JDK-8181493
- WindowsFileAttributes also provides only microsecond resolution
Change-Id: I25ffff31a3c6f725fc345d4ddc2f26da3b88f6f2
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
Jonathan Tan