jgit/org.eclipse.jgit.test at 3f0176aea6e77cb39be35f091100f8874693593d - jgit

纯java实现的git操作库。

Roberto Tyley 5dcc8693d7 Fix concurrent creation of fan-out object directories If multiple threads attempted to insert loose objects into the same new fan-out directory, the creation of that directory was subject to a race condition that could lead to an unnecessary IOException being thrown - because an inserter could not 'create' a directory that had just been generated by a different thread. All we require is that the directory does indeed exist, so not being able to _create_ it is not actually a fatal problem. Setting 'skipExisting' to 'true' on the call to mkdir() fixes the issue. I found this issue as a real world occurrence while working on The BFG Repo Cleaner (https://github.com/rtyley/bfg-repo-cleaner), a tool which concurrently performs a lot of object creation. In order to demonstrate the problem here I've added a small test case which reliably reproduces the issue on the few different hardware systems I've tried. The error thrown when the race-condition arises is this: java.io.IOException: Creating directory /home/roberto/repo.git/objects/e6 failed at org.eclipse.jgit.util.FileUtils.mkdir(FileUtils.java:182) at org.eclipse.jgit.storage.file.ObjectDirectory.insertUnpackedObject(ObjectDirectory.java:590) at org.eclipse.jgit.storage.file.ObjectDirectoryInserter.insertOneObject(ObjectDirectoryInserter.java:113) at org.eclipse.jgit.storage.file.ObjectDirectoryInserter.insert(ObjectDirectoryInserter.java:91) at org.eclipse.jgit.lib.ObjectInserter.insert(ObjectInserter.java:329) Change-Id: I88eac49bc600c56ba9ad290e6133d8a7113125ab		12 years ago
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.settings	Harmonize the JDT settings within JGit	12 years ago
META-INF	Delete the iplog generator, cont'd	12 years ago
exttst/org/eclipse/jgit/patch	Kill GitIndex	13 years ago
tst/org/eclipse/jgit	Fix concurrent creation of fan-out object directories	12 years ago
tst-rsrc	Make ApplyCommand create missing parent directories for new files	13 years ago
.classpath	Partial revert "Switch build to Apache Felix maven-bundle-plugin"	15 years ago
.gitignore	Finish removing Apache Felix maven-bundle-plugin	15 years ago
.project	Enforce the use of Java5 API:s only (with a few exceptions)	13 years ago
build.properties	Partial revert "Switch build to Apache Felix maven-bundle-plugin"	15 years ago
org.eclipse.jgit.core--All-External-Tests (Java 6).launch	Use JUnit4 for tests	14 years ago
org.eclipse.jgit.core--All-External-Tests.launch	Use JUnit4 for tests	14 years ago
org.eclipse.jgit.core--All-Tests (Java 6).launch	Increase heap size for jgit tests	14 years ago
org.eclipse.jgit.core--All-Tests.launch	Use JUnit4 for tests	14 years ago
plugin.properties	Remove incubation marker	14 years ago
pom.xml	Delete the iplog generator	12 years ago