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https://issues.apache.org/jira/browse/HDFS-15270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17080675#comment-17080675
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Babneet Singh commented on HDFS-15270:
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More descriptive details about failure w.r.t. Hadoop and OpenJ9 are reported
here: https://github.com/eclipse/openj9/issues/7752#issuecomment-612149993.
> Account for *env == NULL in hdfsThreadDestructor
> ------------------------------------------------
>
> Key: HDFS-15270
> URL: https://issues.apache.org/jira/browse/HDFS-15270
> Project: Hadoop HDFS
> Issue Type: Bug
> Environment: Please refer to the "steps to reproduce" the failure in
> https://github.com/eclipse/openj9/issues/7752#issue-521732953.
> Reporter: Babneet Singh
> Priority: Major
>
> OpenJ9 JVM properly terminates the thread before hdfsThreadDestructor is
> invoked. JNIEnv is a mirror of J9VMThread in OpenJ9. After proper thread
> termination, accessing JNIEnv in hdfsThreadDestructor (*env)->GetJavaVM,
> yields a SIGSEGV since *env is NULL after thread cleanup is performed.
> The main purpose of hdfsThreadDestructor is to invoke
> DetachCurrentThread, which performs thread cleanup in OpenJ9. Since
> OpenJ9 performs thread cleanup before hdfsThreadDestructor is invoked,
> hdfsThreadDestructor should account for *env == NULL and skip
> DetachCurrentThread.
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