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https://issues.apache.org/jira/browse/HBASE-29363?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17956210#comment-17956210
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Hudson commented on HBASE-29363:
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Results for branch master
[build #1303 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1303/]:
(/) *{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-hbase.apache.org/job/HBase%20Nightly/job/master/1303/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk17 hadoop3 checks{color}
-- For more information [see jdk17
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1303/JDK17_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk17 hadoop 3.3.5 backward compatibility checks{color}
-- For more information [see jdk17
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1303/JDK17_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk17 hadoop 3.3.6 backward compatibility checks{color}
-- For more information [see jdk17
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1303/JDK17_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk17 hadoop 3.4.0 backward compatibility checks{color}
-- For more information [see jdk17
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/master/1303/JDK17_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 source release artifact{color}
-- See build output for details.
(/) {color:green}+1 client integration test for 3.3.5 {color}
(/) {color:green}+1 client integration test for 3.3.6 {color}
(/) {color:green}+1 client integration test for 3.4.0 {color}
(/) {color:green}+1 client integration test for 3.4.1 {color}
> CompactSplit attempts to split non-default regions
> --------------------------------------------------
>
> Key: HBASE-29363
> URL: https://issues.apache.org/jira/browse/HBASE-29363
> Project: HBase
> Issue Type: Bug
> Reporter: Charles Connell
> Assignee: Charles Connell
> Priority: Minor
> Labels: pull-request-available
> Fix For: 2.7.0, 3.0.0-beta-2, 2.6.3, 2.5.12
>
>
> I discovered a problem while running a large cluster with region replicas
> enabled. From time to time, WAL flushes trigger splits, and when the region
> being split is a secondary replica, this split causes problems. The
> {{SplitTableRegionProcedure}} does not permit splitting secondary replicas.
> The RegionServer will send a {{ReportRegionStateTransitionRequest}} to the
> HMaster, which will send back an error response, logging as it does so:
> {noformat}
> 2025-05-29T16:40:27,585
> [RpcServer.priority.RWQ.Fifo.write.handler=12,queue=0,port=60000] ERROR
> org.apache.hadoop.hbase.ipc.RpcServer: Unexpected throwable object
> java.lang.IllegalArgumentException: Can't invoke split on non-default regions
> directly at
> org.apache.hadoop.hbase.master.assignment.SplitTableRegionProcedure.checkSplittable(SplitTableRegionProcedure.java:202)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.assignment.SplitTableRegionProcedure.<init>(SplitTableRegionProcedure.java:137)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.assignment.AssignmentManager.createSplitProcedure(AssignmentManager.java:1159)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.assignment.AssignmentManager.updateRegionSplitTransition(AssignmentManager.java:1359)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.assignment.AssignmentManager.reportRegionStateTransition(AssignmentManager.java:1207)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.assignment.AssignmentManager.reportRegionStateTransition(AssignmentManager.java:1247)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.master.MasterRpcServices.reportRegionStateTransition(MasterRpcServices.java:1807)
> ~[hbase-server-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at
> org.apache.hadoop.hbase.shaded.protobuf.generated.RegionServerStatusProtos$RegionServerStatusService$2.callBlockingMethod(RegionServerStatusProtos.java:16722)
> ~[hbase-protocol-shaded-2.6-hubspot-SNAPSHOT.jar:2.6-hubspot-SNAPSHOT] at ...
> {noformat}
> As a result, the RegionServer will retry the
> {{ReportRegionStateTransitionRequest}} infinitely. The RegionServer is doing
> this in a thread pool task that nothing is waiting on, so it's not really
> bothered by this. In a large cluster, the HMaster request handling threads
> its the logging system will eventually become saturated by the volume of
> these requests coming from many RegionServers.
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