| Commit message (Collapse) | Author | Age | Files | Lines |
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* 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>
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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>
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* 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>
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* 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>
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* 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>
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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>
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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>
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Replace redundant complex implementation of recursive delete by the one
in FileUtils.
Change-Id: Iced1468b96c4f32381a9cf0c651b2bf6a9a9af35
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Use the same JDT core settings as used in org.eclipse.jgit but ignore
non-externalized strings.
Change-Id: If30013c76a197e571601a8abc882ac6a99592374
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Ib709ef050bec31c87f542fb2cc977863dda93ef9
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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In order to enable counting how frequently a test fails if repeated add
option abortOnFailure. If it is true the test aborts on the first
failure. Otherwise it runs the configured number of repetitions and, if
there was any failure, throws a RepeatException reporting how many of
the test repetitions failed.
Change-Id: Ic47de44d4a6273fddf04b9993ad989903efb40c3
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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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>
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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>
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As reported by Error Prone:
An inner class should be static unless it references members of its
enclosing class. An inner class that is made non-static unnecessarily
uses more memory and does not make the intent of the class clear.
See https://errorprone.info/bugpattern/ClassCanBeStatic
Change-Id: Ib99d120532630dba63cf400cc1c61c318286fc41
Signed-off-by: David Pursehouse <david.pursehouse@gmail.com>
(cherry picked from commit ee40efcea44bc0c9a28afe29a80c87636947484e)
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The placeholders in manifest and plugin.properties did not match. To
avoid similar issues, all placeholders have been changed to
Bundle-Vendor and Bundle-Name now.
Bug:548503
Change-Id: Ibd4b9bc237b323e614506b97e5fbc99416365040
Signed-off-by: Michael Keppler <Michael.Keppler@gmx.de>
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Change-Id: I177d637e552a79014816dc5d2ef5ccda506adb39
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I8620d03c1cd5c1d0ad04e7607553e9aa18def9bb
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Ie68828af68d07cf8e3fe778d39436f539f1c73d0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Iea17cba848d4e53d69d34e952a2476c375721aa4
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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* stable-5.3:
Prepare 5.3.3-SNAPSHOT builds
JGit v5.3.2.201906051522-r
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Update API filters for methods added to fix bugs
Bazel: Increase severity of most error-prone checks to ERROR
Enable error-prone checks by default
Add bazel options to align with gerrit's
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Fix API problem filters
Change-Id: Ie1c7e4752661aec9e1754660934921224e2408eb
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Idebf272835cb22c21257c88b414ada802629b665
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I41b4926f4bfa896ef2a13c35e93e08071ae949a3
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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* stable-5.2:
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Fix API problem filters
Change-Id: Id79a3a19f9a31dff94d10a406c2b6e08a506931a
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* stable-5.1:
Prepare 5.1.9-SNAPSHOT builds
JGit v5.1.8.201906050907-r
Test detecting modified packfiles
Enhance fsTick() to use filesystem timer resolution
Add debug trace to measure time needed to open pack index
Extend FileSnapshot for packfiles to also use checksum to detect changes
Wait opening new packfile until it can't be racy anymore
Avoid null PackConfig in GC
Add FileSnapshot test testing recognition of file size changes
Capture reason for result of FileSnapshot#isModified
Skip FileSnapshotTest#testSimulatePackfileReplacement on Windows
Tune max heap size for tests
Fix FileSnapshotTest.testNewFileNoWait() to match its javadoc
ObjectDirectory: fix closing of obsolete packs
Include filekey file attribute when comparing FileSnapshots
Measure file timestamp resolution used in FileSnapshot
Fix FileSnapshot's consideration of file size
Fix API problem filters
Change-Id: I3ac77bfa03f7436de12ab86e1bba29afee5ccd01
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I60571e4e0bea04bb2c25ef3d0332a9ab6895db06
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Iae0ffe161df2ca8a800d21688d6b7d7419dfb640
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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RepositoryTestCase.fsTick() was was waiting 64, 128, 256, ... milliseconds
until it detected that the filesystem timer has ticked. Make use of
the filesystemtimer resolution information in FS to sleep a fraction
of the filesystem timer resolution. That raises probability to wake up
shortly after the filesystem timer has ticked.
Change-Id: Ibcc38576e42ece13b2fd4423a29c459eed167a69
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FileSnapshot.notRacyClean() assumed a worst case filesystem timestamp
resolution of 2.5 sec (FAT has a resolution of 2 sec). Instead measure
timestamp resolution to avoid unnecessary IO caused by false positives
in detecting the racy git problem caused by finite filesystem timestamp
resolution [1].
Cache the measured resolution per FileStore since timestamp resolution
depends on the respective filesystem type. If timestamp resolution
cannot be measured or fails due to an exception fallback to the worst
case FAT timestamp resolution and avoid caching this value.
Add a 10% safety margin in FileSnapshot.notRacyClean(), though running
FsTest.testFsTimestampResolution() 1000 times which is not using a
safety margin didn't fail on Mac using APFS and Java 8, 11, 12.
Measured Java file timestamp resolution: [2]
[1] https://github.com/git/git/blob/master/Documentation/technical/racy-git.txt
[2] https://docs.google.com/spreadsheets/d/1imy0y6WmRqBf0kjCxzxj2X7M50eIVfa7oaUIzEOHmjo
Bug: 546891
Change-Id: I493f3b57b6b306285ffa7d392339d253e5966ab8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I331bbaefd42ef94673ae8565c9b2b3af9eadfda0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Ifaa3a88c5e117912a8c691b8b8369dd9a17faebb
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Ica716b2ad18f8390e75466430ef81c86ea06f004
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Iaf5e451f72dc8512afee99a9f3fb91aa348e3cf5
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: If3313d602aa57cfa031ba2c9ec03bd51b464dc19
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I249a440d1ca1c997343da942ae55fcb27a645b92
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I3eeb24b01a4f955e7e933238defb42635ebfec7d
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I30ba167bcd8144074553d7446a45fa6be19584fe
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Iee86860f3b4eb9f4af818c60342fd29465c0474c
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Ib2c5a79d4fdf77680b7b65652fc3659527df27ad
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I6ae3db901d986467128326073d4ba70406ae8385
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I4ed2aff28bff702a8c1b42814acb04c7ef9025a7
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I9487f6a59ed684ad13bcfbff7d6c730ae4f37030
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Idfefc54e898f364407a931b787a26db2489b031c
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I68d9f5b1c8ca8e8eada9143093dc4fa82519edd8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I8528c913ad1a820ee9a2fa6be1c9125b518caefe
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I18646aaeee51047b234b758dcc1c2f89fd01b2f8
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I79988b473d67e565d8f6bcac40ee9a14b26c9e60
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: Iedd56602acc89783387098c7f92ce0e5bad091e0
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: If3c323acfd2b6933f7d4fbec480cd4e82224f701
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I8dc5e47bd19809d684579610edf922abca3cb3cc
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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Change-Id: I52256a6d07011030698299d9a97dd01ea825fb7f
Signed-off-by: Matthias Sohn <matthias.sohn@sap.com>
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