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https://issues.apache.org/jira/browse/YARN-6630?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16022445#comment-16022445
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Yang Wang commented on YARN-6630:
---------------------------------
When yarn.nodemanager.recovery.enabled is true, nm will not clear any workdir.
However, container.workDir didn't recover and is null.
> Container worker dir could not recover when NM restart
> ------------------------------------------------------
>
> Key: YARN-6630
> URL: https://issues.apache.org/jira/browse/YARN-6630
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Yang Wang
>
> When yarn.nodemanager.recovery.enabled is true and ContainerRetryPolicy is
> NEVER_RETRY, container worker dir will not be saved in NM state store.
> {code:title=ContainerLaunch.java}
> ...
> private void recordContainerWorkDir(ContainerId containerId,
> String workDir) throws IOException{
> container.setWorkDir(workDir);
> if (container.isRetryContextSet()) {
> context.getNMStateStore().storeContainerWorkDir(containerId, workDir);
> }
> }
> {code}
> Then NM restarts, container.workDir is null, and may cause other exceptions.
> {code:title=ContainerImpl.java}
> static class ResourceLocalizedWhileRunningTransition
> extends ContainerTransition {
> ...
> String linkFile = new Path(container.workDir, link).toString();
> ...
> {code}
> {code}
> java.lang.IllegalArgumentException: Can not create a Path from a null string
> at org.apache.hadoop.fs.Path.checkPathArg(Path.java:159)
> at org.apache.hadoop.fs.Path.<init>(Path.java:175)
> at org.apache.hadoop.fs.Path.<init>(Path.java:110)
> ... ...
> {code}
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