Wellington Chevreuil created HBASE-29453:
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Summary: NPE on CacheAwareLoadBalancer.balanceTable
Key: HBASE-29453
URL: https://issues.apache.org/jira/browse/HBASE-29453
Project: HBase
Issue Type: Bug
Components: Balancer
Reporter: Wellington Chevreuil
Found the errors below on master logs when CacheAwareLoadBalancer is enabled:
{noformat}
2025-07-16 12:53:34,360 ERROR org.apache.hadoop.hbase.ScheduledChore: Caught
error
java.lang.NullPointerException: Cannot invoke
"java.util.List.sort(java.util.Comparator)" because "plans" is null
at
org.apache.hadoop.hbase.master.balancer.CacheAwareLoadBalancer.balanceTable(CacheAwareLoadBalancer.java:216)
at
org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.balanceCluster(BaseLoadBalancer.java:1871)
at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1839)
at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1756)
at
org.apache.hadoop.hbase.master.balancer.BalancerChore.chore(BalancerChore.java:47)
at org.apache.hadoop.hbase.ScheduledChore.run(ScheduledChore.java:158)
at
java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at
java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at
java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at
org.apache.hadoop.hbase.JitterScheduledThreadPoolExecutorImpl$JitteredRunnableScheduledFuture.run(JitterScheduledThreadPoolExecutorImpl.java:107)
at
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:840)
{noformat}
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