Merge branch 'stable-6.4' into stable-6.5

* stable-6.4:
  Add missing since tag for SshBasicTestBase
  Add missing since tag for SshTestHarness#publicKey2
  Silence API errors
  Prevent infinite loop rescanning the pack list on
PackMismatchException
  Remove blank in maven.config

Change-Id: I89af76946014fb44bd64c20e2b01a53397768d90

org.eclipse.jgit.junit.ssh/.settings/.api_filters

@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<component id="org.eclipse.jgit.junit.ssh" version="2">
+    <resource path="src/org/eclipse/jgit/junit/ssh/SshTestHarness.java" type="org.eclipse.jgit.junit.ssh.SshTestHarness">
+        <filter id="336658481">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.junit.ssh.SshTestHarness"/>
+                <message_argument value="publicKey2"/>
+    </resource>
+    <resource path="META-INF/MANIFEST.MF">
+        <filter id="923795461">
+            <message_arguments>
+                <message_argument value="5.11.2"/>
+                <message_argument value="5.10.0"/>
+            </message_arguments>
+        </filter>
+    </resource>
+    <resource path="src/org/eclipse/jgit/junit/ssh/SshTestBase.java" type="org.eclipse.jgit.junit.ssh.SshTestBase">
+        <filter id="338792546">
+            <message_arguments>
+                <message_argument value="org.eclipse.jgit.junit.ssh.SshTestBase"/>
+                <message_argument value="testSshWithConfig()"/>
+            </message_arguments>
+        </filter>
+    </resource>
+</component>

org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshBasicTestBase.java

@@ -22,6 +22,8 @@
  * Some minimal cloning and fetching tests. Concrete subclasses can implement
  * the abstract operations from {@link SshTestHarness} to run with different SSH
  * implementations.
+ *
+ * @since 5.11
  */
 public abstract class SshBasicTestBase extends SshTestHarness {
 

org.eclipse.jgit.junit.ssh/src/org/eclipse/jgit/junit/ssh/SshTestHarness.java

@@ -76,6 +76,9 @@ public abstract class SshTestHarness extends RepositoryTestCase {
 
 	protected File publicKey1;
 
+	/**
+	 * @since 5.10
+	 */
 	protected File publicKey2;
 
 	protected SshTestGitServer server;

org.eclipse.jgit/.settings/.api_filters

@@ -1,5 +1,19 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <component id="org.eclipse.jgit" version="2">
+    <resource path="src/org/eclipse/jgit/errors/PackMismatchException.java" type="org.eclipse.jgit.errors.PackMismatchException">
+        <filter id="1142947843">
+            <message_arguments>
+                <message_argument value="5.9.1"/>
+                <message_argument value="isPermanent()"/>
+            </message_arguments>
+        </filter>
+        <filter id="1142947843">
+            <message_arguments>
+                <message_argument value="5.9.1"/>
+                <message_argument value="setPermanent(boolean)"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="src/org/eclipse/jgit/lib/BatchingProgressMonitor.java" type="org.eclipse.jgit.lib.BatchingProgressMonitor">
         <filter id="336695337">
             <message_arguments>
@@ -77,6 +91,12 @@
                 <message_argument value="CONFIG_KEY_PRUNE_PRESERVED"/>
             </message_arguments>
         </filter>
+        <filter id="1142947843">
+            <message_arguments>
+                <message_argument value="5.13.2"/>
+                <message_argument value="CONFIG_KEY_SKIPHASH"/>
+            </message_arguments>
+        </filter>
         <filter id="1142947843">
             <message_arguments>
                 <message_argument value="6.1.1"/>
@@ -150,6 +170,14 @@
             </message_arguments>
         </filter>
     </resource>
+    <resource path="src/org/eclipse/jgit/revwalk/RevCommit.java" type="org.eclipse.jgit.revwalk.RevCommit">
+        <filter id="1193279491">
+            <message_arguments>
+                <message_argument value="6.5.1"/>
+                <message_argument value="buffer"/>
+            </message_arguments>
+        </filter>
+    </resource>
     <resource path="src/org/eclipse/jgit/storage/pack/PackConfig.java" type="org.eclipse.jgit.storage.pack.PackConfig">
         <filter id="336658481">
             <message_arguments>

org.eclipse.jgit/src/org/eclipse/jgit/errors/PackMismatchException.java

@@ -18,6 +18,8 @@
 public class PackMismatchException extends IOException {
 	private static final long serialVersionUID = 1L;
 
+	private boolean permanent;
+
 	/**
 	 * Construct a pack modification error.
 	 *
@@ -27,4 +29,31 @@ public class PackMismatchException extends IOException {
 	public PackMismatchException(String why) {
 		super(why);
 	}
+
+	/**
+	 * Set the type of the exception
+	 *
+	 * @param permanent
+	 *            whether the exception is considered permanent
+	 * @since 5.9.1
+	 */
+	public void setPermanent(boolean permanent) {
+		this.permanent = permanent;
+	}
+
+	/**
+	 * Check if this is a permanent problem
+	 *
+	 * @return if this is a permanent problem and repeatedly scanning the
+	 *         packlist couldn't fix it
+	 * @since 5.9.1
+	 */
+	public boolean isPermanent() {
+		return permanent;
+	}
+
+	@Override
+	public String toString() {
+		return super.toString() + ", permanent: " + permanent; //$NON-NLS-1$
+	}
 }

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/ObjectDirectory.java

@@ -32,6 +32,7 @@
 import java.util.Set;
 import java.util.concurrent.atomic.AtomicReference;
 
+import org.eclipse.jgit.errors.PackMismatchException;
 import org.eclipse.jgit.internal.JGitText;
 import org.eclipse.jgit.internal.storage.pack.ObjectToPack;
 import org.eclipse.jgit.internal.storage.pack.PackExt;
@@ -380,7 +381,8 @@ private ObjectLoader openObjectWithoutRestoring(WindowCursor curs, AnyObjectId o
 	}
 
 	private ObjectLoader openPackedFromSelfOrAlternate(WindowCursor curs,
-			AnyObjectId objectId, Set<AlternateHandle.Id> skips) {
+			AnyObjectId objectId, Set<AlternateHandle.Id> skips)
+			throws PackMismatchException {
 		ObjectLoader ldr = openPackedObject(curs, objectId);
 		if (ldr != null) {
 			return ldr;
@@ -416,7 +418,8 @@ private ObjectLoader openLooseFromSelfOrAlternate(WindowCursor curs,
 		return null;
 	}
 
-	ObjectLoader openPackedObject(WindowCursor curs, AnyObjectId objectId) {
+	ObjectLoader openPackedObject(WindowCursor curs, AnyObjectId objectId)
+			throws PackMismatchException {
 		return packed.open(curs, objectId);
 	}
 
@@ -451,7 +454,8 @@ private long getObjectSizeWithoutRestoring(WindowCursor curs,
 	}
 
 	private long getPackedSizeFromSelfOrAlternate(WindowCursor curs,
-			AnyObjectId id, Set<AlternateHandle.Id> skips) {
+			AnyObjectId id, Set<AlternateHandle.Id> skips)
+			throws PackMismatchException {
 		long len = packed.getSize(curs, id);
 		if (0 <= len) {
 			return len;

org.eclipse.jgit/src/org/eclipse/jgit/internal/storage/file/PackDirectory.java

@@ -60,6 +60,8 @@ class PackDirectory {
 	private final static Logger LOG = LoggerFactory
 			.getLogger(PackDirectory.class);
 
+	private static final int MAX_PACKLIST_RESCAN_ATTEMPTS = 5;
+
 	private static final PackList NO_PACKS = new PackList(FileSnapshot.DIRTY,
 			new Pack[0]);
 
@@ -209,9 +211,11 @@ boolean resolve(Set<ObjectId> matches, AbbreviatedObjectId id,
 		return true;
 	}
 
-	ObjectLoader open(WindowCursor curs, AnyObjectId objectId) {
+	ObjectLoader open(WindowCursor curs, AnyObjectId objectId)
+			throws PackMismatchException {
 		PackList pList;
 		do {
+			int retries = 0;
 			SEARCH: for (;;) {
 				pList = packList.get();
 				for (Pack p : pList.packs) {
@@ -223,6 +227,7 @@ ObjectLoader open(WindowCursor curs, AnyObjectId objectId) {
 					} catch (PackMismatchException e) {
 						// Pack was modified; refresh the entire pack list.
 						if (searchPacksAgain(pList)) {
+							retries = checkRescanPackThreshold(retries, e);
 							continue SEARCH;
 						}
 					} catch (IOException e) {
@@ -235,9 +240,11 @@ ObjectLoader open(WindowCursor curs, AnyObjectId objectId) {
 		return null;
 	}
 
-	long getSize(WindowCursor curs, AnyObjectId id) {
+	long getSize(WindowCursor curs, AnyObjectId id)
+			throws PackMismatchException {
 		PackList pList;
 		do {
+			int retries = 0;
 			SEARCH: for (;;) {
 				pList = packList.get();
 				for (Pack p : pList.packs) {
@@ -250,6 +257,7 @@ long getSize(WindowCursor curs, AnyObjectId id) {
 					} catch (PackMismatchException e) {
 						// Pack was modified; refresh the entire pack list.
 						if (searchPacksAgain(pList)) {
+							retries = checkRescanPackThreshold(retries, e);
 							continue SEARCH;
 						}
 					} catch (IOException e) {
@@ -263,8 +271,9 @@ long getSize(WindowCursor curs, AnyObjectId id) {
 	}
 
 	void selectRepresentation(PackWriter packer, ObjectToPack otp,
-			WindowCursor curs) {
+			WindowCursor curs) throws PackMismatchException {
 		PackList pList = packList.get();
+		int retries = 0;
 		SEARCH: for (;;) {
 			for (Pack p : pList.packs) {
 				try {
@@ -279,6 +288,7 @@ void selectRepresentation(PackWriter packer, ObjectToPack otp,
 				} catch (PackMismatchException e) {
 					// Pack was modified; refresh the entire pack list.
 					//
+					retries = checkRescanPackThreshold(retries, e);
 					pList = scanPacks(pList);
 					continue SEARCH;
 				} catch (IOException e) {
@@ -289,6 +299,15 @@ void selectRepresentation(PackWriter packer, ObjectToPack otp,
 		}
 	}
 
+	private int checkRescanPackThreshold(int retries, PackMismatchException e)
+			throws PackMismatchException {
+		if (retries++ > MAX_PACKLIST_RESCAN_ATTEMPTS) {
+			e.setPermanent(true);
+			throw e;
+		}
+		return retries;
+	}
+
 	private void handlePackError(IOException e, Pack p) {
 		String warnTmpl = null;
 		int transientErrorCount = 0;