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https://issues.apache.org/jira/browse/YARN-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16855396#comment-16855396
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Peter Bacsko edited comment on YARN-9595 at 6/4/19 6:50 AM:
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Thanks for committing this quickly [~tangzhankun]
was (Author: pbacsko):
Thanks for commit this quickly [~tangzhankun]
> FPGA plugin: NullPointerException in
> FpgaNodeResourceUpdateHandler.updateConfiguredResource()
> ---------------------------------------------------------------------------------------------
>
> Key: YARN-9595
> URL: https://issues.apache.org/jira/browse/YARN-9595
> Project: Hadoop YARN
> Issue Type: Bug
> Components: nodemanager
> Reporter: Peter Bacsko
> Assignee: Peter Bacsko
> Priority: Major
> Attachments: YARN-9595-001.patch
>
>
> YARN-9264 accidentally introduced a bug in FpgaDiscoverer. Sometimes
> {{currentFpgaInfo}} is not set, resulting in an NPE being thrown:
> {noformat}
> 2019-06-03 05:14:50,157 INFO org.apache.hadoop.service.AbstractService:
> Service NodeManager failed in state INITED; cause:
> java.lang.NullPointerException
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.resourceplugin.fpga.FpgaNodeResourceUpdateHandler.updateConfiguredResource(FpgaNodeResourceUpdateHandler.java:54)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.updateConfiguredResourcesViaPlugins(NodeStatusUpdaterImpl.java:358)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.serviceInit(NodeStatusUpdaterImpl.java:190)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
> at
> org.apache.hadoop.service.CompositeService.serviceInit(CompositeService.java:108)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.serviceInit(NodeManager.java:459)
> at
> org.apache.hadoop.service.AbstractService.init(AbstractService.java:164)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.initAndStartNodeManager(NodeManager.java:869)
> at
> org.apache.hadoop.yarn.server.nodemanager.NodeManager.main(NodeManager.java:942)
> {noformat}
> The problem is that in {{FpgaDiscoverer}}, we don't set {{currentFpgaInfo}}
> if the following condition is true:
> {noformat}
> if (allowed == null || allowed.equalsIgnoreCase(
> YarnConfiguration.AUTOMATICALLY_DISCOVER_GPU_DEVICES)) {
> return list;
> } else if (allowed.matches("(\\d,)*\\d")){
> ...
> {noformat}
> Solution is simple: initialize it in both code-paths.
> Unit tests should be enhanced to verify that it's set properly.
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