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Posted to yarn-issues@hadoop.apache.org by "Peter Bacsko (JIRA)" <ji...@apache.org> on 2019/06/03 14:47:00 UTC
[jira] [Updated] (YARN-9595) FPGA plugin: NullPointerException in
FpgaNodeResourceUpdateHandler.updateConfiguredResource()
[ https://issues.apache.org/jira/browse/YARN-9595?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Peter Bacsko updated YARN-9595:
-------------------------------
Description:
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.
was:
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, it should always be initialized, just like before.
Unit tests should be enhanced to verify that it's set properly.
> 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
>
> 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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