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https://issues.apache.org/jira/browse/HBASE-26550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17460190#comment-17460190
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Hudson commented on HBASE-26550:
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Results for branch branch-2
[build #418 on
builds.a.o|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/418/]:
(/) *{color:green}+1 overall{color}*
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details (if available):
(/) {color:green}+1 general checks{color}
-- For more information [see general
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/418/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2)
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/418/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/418/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://ci-hadoop.apache.org/job/HBase/job/HBase%20Nightly/job/branch-2/418/JDK11_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test{color}
> Make sure the master is running normally before accepting a balance command
> ---------------------------------------------------------------------------
>
> Key: HBASE-26550
> URL: https://issues.apache.org/jira/browse/HBASE-26550
> Project: HBase
> Issue Type: Bug
> Components: Balancer, master
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Minor
> Fix For: 2.5.0, 2.6.0, 3.0.0-alpha-3
>
>
> Noticed this in a unit test from [https://github.com/apache/hbase/pull/3851]
> I believe this is a result of the new balance() implementation in the Master,
> and a client submitting a request to the master before it's completed its
> instantiation. Simple fix to avoid the NPE.
> {noformat}
> Failed after attempts=2, exceptions:
> 2021-12-07T18:14:19.203Z, java.io.IOException: java.io.IOException
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:461)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:138)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:354)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:334)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.HMaster.getProcedures(HMaster.java:3335)
> at
> org.apache.hadoop.hbase.master.ServerManager.areDeadServersInProgress(ServerManager.java:505)
> at org.apache.hadoop.hbase.master.HMaster.balance(HMaster.java:1886)
> at
> org.apache.hadoop.hbase.master.MasterRpcServices.balance(MasterRpcServices.java:740)
> at
> org.apache.hadoop.hbase.shaded.protobuf.generated.MasterProtos$MasterService$2.callBlockingMethod(MasterProtos.java)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:393)
> ... 3 more {noformat}
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