zhangduo created HBASE-13145:
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Summary: TestNamespaceAuditor.testRegionMerge is flaky
Key: HBASE-13145
URL: https://issues.apache.org/jira/browse/HBASE-13145
Project: HBase
Issue Type: Bug
Components: test
Reporter: zhangduo
Dig into the log
https://builds.apache.org/job/HBase-TRUNK/6197/artifact/hbase-server/target/surefire-reports/org.apache.hadoop.hbase.namespace.TestNamespaceAuditor-output.txt
Seems a split operation which we expect to success is started before we
finishing a merge and cause an infinite sleep loop.
I guess the problem is here
{code:title=TestNamespaceAuditor.java}
// merge the two regions
admin.mergeRegions(hris.get(0).getEncodedNameAsBytes(),
hris.get(1).getEncodedNameAsBytes(), false);
while (admin.getTableRegions(tableTwo).size() == initialRegions) {
Thread.sleep(100);
}
{code}
I guess that during a merge, we can get more region count than before because
we first online the new region and then offline the two old regions.
So change it to admin.getTableRegions(tableTwo).size() != initialRegions - 1
may work.
And we can modify the while loop to use Waiter.waitFor which can provide more
useful information when test failed.
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