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stack commented on HBASE-20936: ------------------------------- Looks like there is an old issue that shows same problem, HBASE-19263. > BaseLoadBalancer throws ArrayIndexOutOfBoundsException > ------------------------------------------------------ > > Key: HBASE-20936 > URL: https://issues.apache.org/jira/browse/HBASE-20936 > Project: HBase > Issue Type: Bug > Components: Balancer > Affects Versions: 2.0.1 > Reporter: stack > Priority: Major > > I see the below in a test cluster. The balancer code has been in place a long > time. Not sure why its doing the below. Will look later. Meantime, making a > record of it. > {code} > 2018-07-24 22:03:43,261 INFO [master/ve0524:16000.Chore.1] > balancer.StochasticLoadBalancer: start StochasticLoadBalancer.balancer, > initCost=280.47655219381977, functionCost=RegionCountSkewCostFunction : > (500.0, 0.4992354740061162); PrimaryRegionCountSkewCostFunction : (500.0, > 0.0); MoveCostFunction : (7.0, 0.0); ServerLocalityCostFunction : (25.0, > 0.5961002123692674); RackLocalityCostFunction : (15.0, 0.0); > TableSkewCostFunction : (35.0, 0.3660578386605784); > RegionReplicaHostCostFunction : (100000.0, 0.0); > RegionReplicaRackCostFunction : (10000.0, 0.0); ReadRequestCostFunction : > (5.0, 0.0); WriteRequestCostFunction : (5.0, 0.0); MemStoreSizeCostFunction : > (5.0, 0.0); StoreFileCostFunction : (5.0, 0.6288571056819432); > 2018-07-24 22:03:43,322 ERROR [master/ve0524:16000.Chore.1] > hbase.ScheduledChore: Caught error > java.lang.ArrayIndexOutOfBoundsException: 64 > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.removeRegion(BaseLoadBalancer.java:872) > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.regionMoved(BaseLoadBalancer.java:827) > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.doAction(BaseLoadBalancer.java:723) > at > org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:399) > at > org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:318) > at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1514) > at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1445) > at > org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:49) > at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:186) > at > java.util.concurrent.Executors$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$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:111) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > 2018-07-24 22:08:20,101 INFO [LruBlockCacheStatsExecutor] > hfile.LruBlockCache: totalSize=4.61 MB, freeSize=6.14 GB, max=6.14 GB, > blockCount=0, accesses=0, hits=0, hitRatio=0, cachingAccesses=0, > cachingHits=0, cachingHitsRatio=0,evictions=119, evicted=0, evictedPerRun=0.0 > 2018-07-24 22:08:38,101 INFO [master/ve0524:16000.Chore.1] > balancer.StochasticLoadBalancer: start StochasticLoadBalancer.balancer, > initCost=280.4765419610035, functionCost=RegionCountSkewCostFunction : > (500.0, 0.4992354740061162); PrimaryRegionCountSkewCostFunction : (500.0, > 0.0); MoveCostFunction : (7.0, 0.0); ServerLocalityCostFunction : (25.0, > 0.5961002123692674); RackLocalityCostFunction : (15.0, 0.0); > TableSkewCostFunction : (35.0, 0.3660578386605784); > RegionReplicaHostCostFunction : (100000.0, 0.0); > RegionReplicaRackCostFunction : (10000.0, 0.0); ReadRequestCostFunction : > (5.0, 0.0); WriteRequestCostFunction : (5.0, 0.0); MemStoreSizeCostFunction : > (5.0, 0.0); StoreFileCostFunction : (5.0, 0.6288550591186913); > 2018-07-24 22:08:38,103 ERROR [master/ve0524:16000.Chore.1] > hbase.ScheduledChore: Caught error > java.lang.ArrayIndexOutOfBoundsException: 100 > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.removeRegion(BaseLoadBalancer.java:872) > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.regionMoved(BaseLoadBalancer.java:827) > at > org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.doAction(BaseLoadBalancer.java:723) > at > org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:399) > at > org.apache.hadoop.hbase.master.balancer.StochasticLoadBalancer.balanceCluster(StochasticLoadBalancer.java:318) > at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1514) > at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1445) > at > org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:49) > at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:186) > at > java.util.concurrent.Executors$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$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:111) > at > java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) > at > java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) > at java.lang.Thread.run(Thread.java:748) > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)