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https://issues.apache.org/jira/browse/HBASE-28146?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17778924#comment-17778924
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Hudson commented on HBASE-28146:
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Results for branch branch-2.4
[build #639 on
builds.a.o|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.4/639/]:
(/) *{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/branch-2.4/639/General_20Nightly_20Build_20Report/]
(/) {color:green}+1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2)
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.4/639/JDK8_20Nightly_20Build_20Report_20_28Hadoop2_29/]
(/) {color:green}+1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3)
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.4/639/JDK8_20Nightly_20Build_20Report_20_28Hadoop3_29/]
(/) {color:green}+1 jdk11 hadoop3 checks{color}
-- For more information [see jdk11
report|https://ci-hbase.apache.org/job/HBase%20Nightly/job/branch-2.4/639/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}
> Remove ServerManager's rsAdmins map
> -----------------------------------
>
> Key: HBASE-28146
> URL: https://issues.apache.org/jira/browse/HBASE-28146
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 2.5.5
> Reporter: Ray Mattingly
> Assignee: Ray Mattingly
> Priority: Major
> Fix For: 2.6.0, 2.4.18, 2.5.7
>
>
> On 2.x [the ServerManager registers admins in a
> HashMap|https://github.com/apache/hbase/blob/branch-2/hbase-server/src/main/java/org/apache/hadoop/hbase/master/ServerManager.java].
> This can result in thread safety issues — we recently observed an exception
> which caused a region to be indefinitely stuck in transition until we could
> manually intervene. We saw the following exception in the HMaster logs:
> {code:java}
> 2023-10-11 02:20:05.213 [RSProcedureDispatcher-pool-325] ERROR
> org.apache.hadoop.hbase.master.procedure.RSProcedureDispatcher: Unexpected
> error caught, this may cause the procedure to hang forever
> java.lang.ClassCastException: class java.util.HashMap$Node cannot be cast
> to class java.util.HashMap$TreeNode (java.util.HashMap$Node and
> java.util.HashMap$TreeNode are in module java.base of loader 'bootstrap')
> at java.util.HashMap$TreeNode.moveRootToFront(HashMap.java:1900)
> ~[?:?]
> at java.util.HashMap$TreeNode.treeify(HashMap.java:2016) ~[?:?]
> at java.util.HashMap.treeifyBin(HashMap.java:768) ~[?:?]
> at java.util.HashMap.putVal(HashMap.java:640) ~[?:?]
> at java.util.HashMap.put(HashMap.java:608) ~[?:?]
> at
> org.apache.hadoop.hbase.master.ServerManager.getRsAdmin(ServerManager.java:723){code}
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