[
https://issues.apache.org/jira/browse/HBASE-4515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13117623#comment-13117623
]
Jonathan Hsieh commented on HBASE-4515:
---------------------------------------
A stack trace of the error that I'd like to avoid.
{code}
2011-09-29 11:38:45,823 ERROR [Thread-341] hbase.MiniHBaseCluster(201): Error
starting cluster
java.lang.NullPointerException
at org.apache.hadoop.hbase.security.User.getName(User.java:71)
at
org.apache.hadoop.hbase.HBaseTestingUtility.getDifferentUser(HBaseTestingUtility.java:1421)
at
org.apache.hadoop.hbase.MiniHBaseCluster.init(MiniHBaseCluster.java:191)
at
org.apache.hadoop.hbase.MiniHBaseCluster.<init>(MiniHBaseCluster.java:76)
at
org.apache.hadoop.hbase.MiniHBaseCluster.<init>(MiniHBaseCluster.java:61)
at
org.apache.hadoop.hbase.HBaseTestingUtility.restartHBaseCluster(HBaseTestingUtility.java:505)
at
org.apache.hadoop.hbase.util.hbck.TestOfflineMetaRebuild.testMetaRebuild(TestOfflineMetaRebuild.java:306)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at
org.junit.internal.runners.statements.FailOnTimeout$1.run(FailOnTimeout.java:28)
{code}
> User.getCurrent() can cause NPE.
> --------------------------------
>
> Key: HBASE-4515
> URL: https://issues.apache.org/jira/browse/HBASE-4515
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.92.0, 0.94.0
> Reporter: Jonathan Hsieh
> Assignee: Jonathan Hsieh
>
> When testing with miniclusters that shutdown and are restarted, sometimes a
> call to User.getCurrent().getName() NPEs when attempting to restart hbase.
> Oddly this happens consistently on particular branches and not on others. I
> don't know or understand why this happens but it has something to do with the
> getCurrentUGI call in o.a.h.h.security.User.HadoopUser sometimes returning
> null and sometimes returning data.
> {code}
> private HadoopUser() {
> try {
> ugi = (UserGroupInformation) callStatic("getCurrentUGI");
> if (ugi == null) {
> LOG.warn("Although successfully retrieved UserGroupInformation"
> + " it was null!");
> }
> } catch (RuntimeException re) {
> {code}
> This patch essentially is a workaround -- it propagates the null so that
> clients can check and avoid the NPE.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
