Jimmy Xiang created HBASE-9048:
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Summary: HCM throws NullPointerException under load
Key: HBASE-9048
URL: https://issues.apache.org/jira/browse/HBASE-9048
Project: HBase
Issue Type: Bug
Components: Client
Reporter: Jimmy Xiang
Assignee: Jimmy Xiang
Priority: Minor
HCM uses SoftValueSortedMap to cache region locations. Under load, some soft
referred values may be GCed. So we should check if the value is null.
Otherwise, NPE will be thrown:
{code}
for (Map<byte[], HRegionLocation> tableLocations :
cachedRegionLocations.values()) {
for (Entry<byte[], HRegionLocation> e : tableLocations.entrySet()) {
===> if (serverName.equals(e.getValue().getServerName())) {
tableLocations.remove(e.getKey());
deletedSomething = true;
}
}
}
{code}
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