[jira] [Created] (HBASE-14885) NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor

["Ted Yu (JIRA)" <ji...@apache.org>]

Ted Yu created HBASE-14885:
------------------------------

             Summary: NullPointerException in HMaster#normalizeRegions() due to missing TableDescriptor
                 Key: HBASE-14885
                 URL: https://issues.apache.org/jira/browse/HBASE-14885
             Project: HBase
          Issue Type: Bug
    Affects Versions: 1.3.0
            Reporter: Ted Yu
            Assignee: Ted Yu


During system test on Windows, we observed the following in master log:
{code}
2015-11-23 11:31:38,853 ERROR org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore: Caught error^M
java.lang.NullPointerException^M
  at org.apache.hadoop.hbase.master.HMaster.normalizeRegions(HMaster.java:1396)^M
  at org.apache.hadoop.hbase.master.normalizer.RegionNormalizerChore.chore(RegionNormalizerChore.java:49)^M
  at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:185)^M
  at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)^M
  at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)^M
  at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)^M
  at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)^M
  at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)^M
  at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)^M
  at java.lang.Thread.run(Thread.java:745)^M
{code}
The NullPointerException came from the second line below:
{code}
      for(TableName table : allEnabledTables) {
        if (table.isSystemTable() || !getTableDescriptors().get(table).isNormalizationEnabled()) {
{code}
It seems TableDescriptor for some table was absent.

normalizeRegions() should deal with such scenario without producing NPE.



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