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  1. HBase
  2. HBASE-22739

ArrayIndexOutOfBoundsException when balance

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      2019-07-25 15:19:59,828 ERROR [master/nna:16000.Chore.1] hbase.ScheduledChore: Caught error
      java.lang.ArrayIndexOutOfBoundsException: 3171
      at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.removeRegion(BaseLoadBalancer.java:873)
      at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.doAction(BaseLoadBalancer.java:716)
      at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:407)
      at org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:318)
      at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1650)
      at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1567)
      at org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:49)
      at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:186)
      at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
      at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
      at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
      at org.apache.hadoop.hbase.JitterScheduledThreadPoolExecutorImpl$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:111)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
      at java.lang.Thread.run(Thread.java:745)
      
      
      

      should check if the regionIndex is valid when removeRegion,

      java: hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java

      int[] removeRegion(int[] regions, int regionIndex) {
          //TODO: this maybe costly. Consider using linked lists
          int[] newRegions = new int[regions.length - 1];
          int i = 0;
          for (i = 0; i < regions.length; i++) {
              if (regions[i] == regionIndex) {
                  break;
              }
              if (i == regions.length - 1) {
                  return Arrays.copyOf(regions, regions.length);
              }
              newRegions[i] = regions[i];
          }
          System.arraycopy(regions, i+1, newRegions, i, newRegions.length - i);
          return newRegions;
      }
      

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              • Assignee:
                binlijin Lijin Bin
                Reporter:
                casuallc casuallc
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