[
https://issues.apache.org/jira/browse/HBASE-22739?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16896777#comment-16896777
]
Anoop Sam John commented on HBASE-22739:
----------------------------------------
Is it because of some other ongoing process which some how removed this region?
The safe check here alone might not be enough right? Because the callee
expecting region to be removed from fromServer and then adding to toServer and
then do further. That assumptions also broken. So better to do a root cause
find IMO.
> ArrayIndexOutOfBoundsException when balance
> -------------------------------------------
>
> Key: HBASE-22739
> URL: https://issues.apache.org/jira/browse/HBASE-22739
> Project: HBase
> Issue Type: Bug
> Components: Balancer
> Reporter: casuallc
> Priority: Major
> Fix For: 2.1.1
>
>
>
> {code:java}
> 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)
> {code}
> should check if the regionIndex is valid when removeRegion,
> java:
> hbase-server/src/main/java/org/apache/hadoop/hbase/master/balancer/BaseLoadBalancer.java
> {code: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;
> }
> {code}
--
This message was sent by Atlassian JIRA
(v7.6.14#76016)
