Bo Cui created HBASE-25092:
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Summary: RSGroupBalancer#assignments lost some regionPlans
Key: HBASE-25092
URL: https://issues.apache.org/jira/browse/HBASE-25092
Project: HBase
Issue Type: Bug
Components: rsgroup
Affects Versions: 2.2.3, 2.3.1
Reporter: Bo Cui
https://github.com/apache/hbase/blob/b2f2c79d8fa18fb691e669419004cc5168b0838d/hbase-rsgroup/src/main/java/org/apache/hadoop/hbase/rsgroup/RSGroupBasedLoadBalancer.java#L216
when fallbak is enabled, servers does not contain the current group's rs, and
contains the rs of other group, region will be assigend to other group, but
assignments already contains targetRS, and then assignments.putAll overwrites
old entry
{code:java}
this.internalBalancer.retainAssignment(currentAssignmentMap, candidateList)
.forEach((serverName, regionInfos) -> {
assignments.computeIfAbsent(serverName, s -> new ArrayList<>())
.addAll(regionInfos);
});
{code}
the issue exists only in the branch-2.
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