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https://jira.codehaus.org/browse/SUREFIRE-906?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Christopher Mosher updated SUREFIRE-906:
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Attachment: SUREFIRE-906-0001.patch
I was able to fix it with the attached patch. It did not have to do with the
output files. Instead it was a non-thread-safe issue with the properties
object. Multiple threads in the parent (forking) process were accessing the
same properties... the clone() call that was there must not have been enough to
ensure thread safety.
> Sometimes get NullPointerException in forked process
> ----------------------------------------------------
>
> Key: SUREFIRE-906
> URL: https://jira.codehaus.org/browse/SUREFIRE-906
> Project: Maven Surefire
> Issue Type: Bug
> Components: process forking
> Affects Versions: 2.13.0
> Environment: Arch linux
> Reporter: Christopher Mosher
> Attachments: SUREFIRE-906-0001.patch
>
>
> (This is using the latest 2.13-SNAPSHOT)
> Using forkMode=perthread, the child processes sometimes abort with this
> exception:
> java.lang.NullPointerException
> at java.io.File.<init>(File.java:251)
> at
> org.apache.maven.surefire.booter.BooterDeserializer.deserialize(BooterDeserializer.java:61)
> at
> org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:63)
> It only happens sometimes.
> Using -X keeps the temp files, and looking at the file that's supposed to
> pass the properties, I see that the file is truncated midway, causing the
> exception.
> Possibly the parent process needs to *flush* the file after it writes to it
> before is closes it.
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