Viraj Jasani created HBASE-25884:
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Summary: NPE while getting Balancer decisions
Key: HBASE-25884
URL: https://issues.apache.org/jira/browse/HBASE-25884
Project: HBase
Issue Type: Task
Reporter: Viraj Jasani
Assignee: Viraj Jasani
With HBASE-25790 in place, we have new balancer queue: BalancerRejection in
addition to BalancerDecision. However, now while retrieving records from ring
buffer, only if exactly one of the ring buffers are enabled, we get NPE while
retrieving the other one. Ideally it should return empty results.
Result of get_balancer_decision when only rejection queue is enabled but not
the balancer decision one.
{code:java}
2021-05-02T21:22:31,830 WARN [RPCClient-NioEventLoopGroup-1-2]
client.AsyncRpcRetryingCaller: Call to master failed, tries = 6, maxAttempts =
7, timeout = 1200000 ms, time elapsed = 2360 ms2021-05-02T21:22:31,830 WARN
[RPCClient-NioEventLoopGroup-1-2] client.AsyncRpcRetryingCaller: Call to master
failed, tries = 6, maxAttempts = 7, timeout = 1200000 ms, time elapsed = 2360
msjava.io.IOException: java.io.IOException at
org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:463) at
org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:135) at
org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338) at
org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)Caused
by: java.lang.NullPointerException at
org.apache.hadoop.hbase.master.MasterRpcServices.getBalancerDecisions(MasterRpcServices.java:3432)
at
org.apache.hadoop.hbase.master.MasterRpcServices.getLogEntries(MasterRpcServices.java:3395)
at
org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:395) ... 3 more
{code}
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