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https://issues.apache.org/jira/browse/HBASE-16462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15436254#comment-15436254
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Ted Yu commented on HBASE-16462:
--------------------------------
TestRSGroups took 2:32 min on my Mac - in the past it used to hang.
+1
> Test failure TestRSGroupsBase.testGroupBalance
> ----------------------------------------------
>
> Key: HBASE-16462
> URL: https://issues.apache.org/jira/browse/HBASE-16462
> Project: HBase
> Issue Type: Bug
> Reporter: Guangxu Cheng
> Attachments: HBASE-16462-v1.patch, HBASE-16462-v2.patch,
> HBASE-16462-v3.patch
>
>
> show this fail when TestRSGroupsBase
> {code}
> testGroupBalance(org.apache.hadoop.hbase.rsgroup.TestRSGroups) Time elapsed:
> 309.517 sec <<< FAILURE!
> java.lang.AssertionError: Waiting timed out after [300,000] msec
> at org.junit.Assert.fail(Assert.java:88)
> at org.apache.hadoop.hbase.Waiter.waitFor(Waiter.java:209)
> at org.apache.hadoop.hbase.Waiter.waitFor(Waiter.java:143)
> at
> org.apache.hadoop.hbase.HBaseTestingUtility.waitFor(HBaseTestingUtility.java:3816)
> at
> org.apache.hadoop.hbase.rsgroup.TestRSGroupsBase.testGroupBalance(TestRSGroupsBase.java:434)
> {code}
> The exception may be caused by a bug.
> {code:title=TestRSGroupsBase.java|borderStyle=solid}
> rsGroupAdmin.balanceRSGroup(newGroupName);
> TEST_UTIL.waitFor(WAIT_TIMEOUT, new Waiter.Predicate<Exception>() {
> @Override
> public boolean evaluate() throws Exception {
> for (List<String> regions :
> getTableServerRegionMap().get(tableName).values()) {
> if (2 != regions.size()) {
> return false;
> }
> }
> return true;
> }
> });
> {code}
> The new Group has one table and three servers, and the table has six regions.
> Beginning, all regions are located on a single server.
> After balance, regions distributed on three server, preferably each server on
> two region.
> However,this is not absolute. Maybe one server has one region, another server
> has three regions.
> So, while waiting for the results of balance, we need only determine whether
> the region on the server, without having to check region's number.
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