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https://issues.apache.org/jira/browse/HDFS-14251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758313#comment-16758313
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Kevin Risden commented on HDFS-14251:
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Another note about the addReplicaThreadPool ForkJoinPool in BlockPoolSlice, it
is never shutdown during the BlockPoolSlice.shutdown(...) method. The shutdown
hook is cleaned up but the addReplicaThreadPool is only ever shutdown in the
shutdown hook. HDFS-12984 cleaned up the shutdown hook but -HDFS-13768- assumed
that the shutdown hook would be called.
> BlockPoolSlice ForkJoinPool introduced by HDFS-13768 breaks under Java
> SecurityManager
> ---------------------------------------------------------------------------------------
>
> Key: HDFS-14251
> URL: https://issues.apache.org/jira/browse/HDFS-14251
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.10.0, 3.2.0, 3.1.2
> Reporter: Kevin Risden
> Priority: Major
>
> HDFS-13768 introduced ForkJoinPool to improve performance of BlockPoolSlice.
> The created ForkJoinPool doesn't pass in a custom thread factory and by
> default the thread factory prevents all privileges under the Java
> SecurityManager.
> This broke when integrating Hadoop 3.2.0 with Apache Solr in SOLR-9515.
> It isn't clear that the ForkJoinPool is necessary when a regular normal
> executor could work instead?
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