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https://issues.apache.org/jira/browse/MNG-7705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17697329#comment-17697329
]
Michael Osipov commented on MNG-7705:
-------------------------------------
Something isn't right here or missing from strace output. Let me show you an
example how I would the calls expect to be:
For that I will use
[{{lockf(1)}}|https://man.freebsd.org/cgi/man.cgi?query=lockf&apropos=0&sektion=0&manpath=FreeBSD+13.1-RELEASE+and+Ports&arch=default&format=html]
for POSIX advisory file locks.
One terminal: {{truss -d -o out-1 -f lockf -t 5 /tmp/flock sh -c "sleep 5; echo
term 1"}}
Second terminal: One terminal: {{truss -d -o out-2 -f lockf -t 5 /tmp/flock sh
-c "sleep 5; echo term 2"}}
Output:
{{out-1}}:
{noformat}
55 85584: 0.004030794
openat(AT_FDCWD,"/tmp/flock",O_RDONLY|O_NONBLOCK|O_EXLOCK|O_CREAT,0666) = 3
(0x3)
{noformat}
{{out-2}}:
{noformat}
55 85589: 0.004000679
openat(AT_FDCWD,"/tmp/flock",O_RDONLY|O_NONBLOCK|O_EXLOCK|O_CREAT,0666) ERR#35
'Resource temporarily unavailable'
56 85589: 3.827615781 openat(AT_FDCWD,"/tmp/flock",O_RDONLY|O_EXLOCK,00) = 3
(0x3)
57 85589: 3.827708513 close(3) = 0 (0x0)
58 85589: 3.827815432
openat(AT_FDCWD,"/tmp/flock",O_RDONLY|O_NONBLOCK|O_EXLOCK|O_CREAT,0666) = 3
(0x3)
{noformat}
Note the {{O_EXLOCK}}. I don't expect the JVM to use explicitly this technique,
but at least any equivalent technique depicted in the reference.
Good ref: https://gavv.net/articles/file-locks/
[~cstamas], I do remember that you had some sample Java code to test with. Can
you provide that one again, I'd like to run it on RHEL and FreeBSD and check
the output of it.
> Sporadic failures on multiple builds sharing the same local repo when writing
> the .lastUpdated file
> ---------------------------------------------------------------------------------------------------
>
> Key: MNG-7705
> URL: https://issues.apache.org/jira/browse/MNG-7705
> Project: Maven
> Issue Type: Bug
> Affects Versions: 3.9.0
> Environment: Apache Maven 3.9.0
> (9b58d2bad23a66be161c4664ef21ce219c2c8584)
> Maven home: /data00/bamboo/maven/maven-next
> Java version: 1.8.0_362, vendor: Red Hat, Inc., runtime:
> /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.362.b09-2.el8_7.x86_64/jre
> Default locale: en_CA, platform encoding: ISO-8859-1
> OS name: "linux", version: "4.18.0-193.el8.x86_64", arch: "amd64", family:
> "unix"
> Reporter: Jim Sellers
> Priority: Minor
> Attachments: 2023-02-28_failure.zip, MNG-7705-2023-02-27.zip,
> MNG-7705.zip, MNG-7705_strace_2023-02-27.zip,
> apache-maven-3.9.1-SNAPSHOT-bin.tar.gz, maven-resolver-util-1.9.6-SNAPSHOT.jar
>
>
> On a CI server, we have multiple builds running on the same host and sharing
> the same repo.
> While testing 3.9.0, I started to see a NIO exception for the
> {{.lastUpdated}} file. This has worked fine for years, all the way up to
> 3.8.7.
> If you re-run the build, it will work. I think that it's just a collision
> between the different processes.
> {code:title=example command}
> mvn --batch-mode dependency:sources dependency:resolve -Dclassifier=javadoc
> # this uses dependency:3.5.0:sources
> {code}
> {code:title=stracktrace}
> [WARNING] Failed to write tracking file
> '/home/bamboo/.m2/repository/io/smallrye/config/smallrye-config/2.3.0/smallrye-config-2.3.0-javadoc.jar.lastUpdated'
> java.nio.file.NoSuchFileException:
> /home/bamboo/.m2/repository/io/smallrye/config/smallrye-config/2.3.0/smallrye-config-2.3.0-javadoc.jar.lastUpdated
> at sun.nio.fs.UnixException.translateToIOException
> (UnixException.java:86)
> at sun.nio.fs.UnixException.rethrowAsIOException
> (UnixException.java:102)
> at sun.nio.fs.UnixException.rethrowAsIOException
> (UnixException.java:107)
> at sun.nio.fs.UnixFileSystemProvider.newByteChannel
> (UnixFileSystemProvider.java:214)
> at java.nio.file.Files.newByteChannel (Files.java:361)
> at java.nio.file.Files.newByteChannel (Files.java:407)
> at java.nio.file.spi.FileSystemProvider.newInputStream
> (FileSystemProvider.java:384)
> at java.nio.file.Files.newInputStream (Files.java:152)
> at org.eclipse.aether.internal.impl.DefaultTrackingFileManager.update
> (DefaultTrackingFileManager.java:90)
> at org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.write
> (DefaultUpdateCheckManager.java:604)
> at
> org.eclipse.aether.internal.impl.DefaultUpdateCheckManager.touchArtifact
> (DefaultUpdateCheckManager.java:539)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.evaluateDownloads
> (DefaultArtifactResolver.java:701)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.performDownloads
> (DefaultArtifactResolver.java:592)
> at org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolve
> (DefaultArtifactResolver.java:478)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifacts
> (DefaultArtifactResolver.java:278)
> at
> org.eclipse.aether.internal.impl.DefaultArtifactResolver.resolveArtifact
> (DefaultArtifactResolver.java:255)
> at
> org.eclipse.aether.internal.impl.DefaultRepositorySystem.resolveArtifact
> (DefaultRepositorySystem.java:296)
> at
> org.apache.maven.shared.transfer.artifact.resolve.internal.Maven31ArtifactResolver.resolveArtifact
> (Maven31ArtifactResolver.java:97)
> at
> org.apache.maven.shared.transfer.artifact.resolve.internal.Maven31ArtifactResolver.resolveArtifact
> (Maven31ArtifactResolver.java:78)
> at
> org.apache.maven.shared.transfer.artifact.resolve.internal.DefaultArtifactResolver.resolveArtifact
> (DefaultArtifactResolver.java:70)
> at
> org.apache.maven.plugins.dependency.fromDependencies.AbstractDependencyFilterMojo.resolve
> (AbstractDependencyFilterMojo.java:464)
> at
> org.apache.maven.plugins.dependency.fromDependencies.AbstractDependencyFilterMojo.getClassifierTranslatedDependencies
> (AbstractDependencyFilterMojo.java:408)
> at
> org.apache.maven.plugins.dependency.fromDependencies.AbstractDependencyFilterMojo.getDependencySets
> (AbstractDependencyFilterMojo.java:340)
> at
> org.apache.maven.plugins.dependency.resolvers.ResolveDependenciesMojo.doExecute
> (ResolveDependenciesMojo.java:103)
> at
> org.apache.maven.plugins.dependency.resolvers.ResolveDependencySourcesMojo.doExecute
> (ResolveDependencySourcesMojo.java:52)
> at org.apache.maven.plugins.dependency.AbstractDependencyMojo.execute
> (AbstractDependencyMojo.java:159)
> at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo
> (DefaultBuildPluginManager.java:126)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute2
> (MojoExecutor.java:342)
> at org.apache.maven.lifecycle.internal.MojoExecutor.doExecute
> (MojoExecutor.java:330)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:213)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:175)
> at org.apache.maven.lifecycle.internal.MojoExecutor.access$000
> (MojoExecutor.java:76)
> at org.apache.maven.lifecycle.internal.MojoExecutor$1.run
> (MojoExecutor.java:163)
> at org.apache.maven.plugin.DefaultMojosExecutionStrategy.execute
> (DefaultMojosExecutionStrategy.java:39)
> at org.apache.maven.lifecycle.internal.MojoExecutor.execute
> (MojoExecutor.java:160)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:105)
> at
> org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject
> (LifecycleModuleBuilder.java:73)
> at
> org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build
> (SingleThreadedBuilder.java:53)
> at org.apache.maven.lifecycle.internal.LifecycleStarter.execute
> (LifecycleStarter.java:118)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:260)
> at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:172)
> at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:100)
> at org.apache.maven.cli.MavenCli.execute (MavenCli.java:821)
> at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:270)
> at org.apache.maven.cli.MavenCli.main (MavenCli.java:192)
> at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke
> (NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke
> (DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke (Method.java:498)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced
> (Launcher.java:282)
> at org.codehaus.plexus.classworlds.launcher.Launcher.launch
> (Launcher.java:225)
> at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode
> (Launcher.java:406)
> at org.codehaus.plexus.classworlds.launcher.Launcher.main
> (Launcher.java:347)
> {code}
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