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Date: Fri, 21 Nov 2014 15:57:33 +0000 (UTC)
From: "Ted Yu (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
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Subject: [jira] [Updated] (HBASE-12554) TestBaseLoadBalancer may timeout due
 to lengthy hostname lookup
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     [ https://issues.apache.org/jira/browse/HBASE-12554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu updated HBASE-12554:
---------------------------
    Summary: TestBaseLoadBalancer may timeout due to lengthy hostname lookup  (was: TestBaseLoadBalancer may timeout due to long hostname lookup)

> TestBaseLoadBalancer may timeout due to lengthy hostname lookup
> ---------------------------------------------------------------
>
>                 Key: HBASE-12554
>                 URL: https://issues.apache.org/jira/browse/HBASE-12554
>             Project: HBase
>          Issue Type: Test
>            Reporter: Ted Yu
>
> Here is one of the recent occurrences (https://builds.apache.org/job/PreCommit-HBASE-Build/11778/console):
> {code}
> testImmediateAssignment(org.apache.hadoop.hbase.master.balancer.TestBaseLoadBalancer)  Time elapsed: 30.019 sec  <<< ERROR!
> java.lang.Exception: test timed out after 30000 milliseconds
> 	at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method)
> 	at java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:901)
> 	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1293)
> 	at java.net.InetAddress.getAllByName0(InetAddress.java:1246)
> 	at java.net.InetAddress.getAllByName(InetAddress.java:1162)
> 	at java.net.InetAddress.getAllByName(InetAddress.java:1098)
> 	at java.net.InetAddress.getByName(InetAddress.java:1048)
> 	at org.apache.hadoop.net.NetUtils.normalizeHostName(NetUtils.java:561)
> 	at org.apache.hadoop.net.NetUtils.normalizeHostNames(NetUtils.java:578)
> 	at org.apache.hadoop.net.CachedDNSToSwitchMapping.resolve(CachedDNSToSwitchMapping.java:109)
> 	at org.apache.hadoop.hbase.master.RackManager.getRack(RackManager.java:66)
> 	at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer$Cluster.<init>(BaseLoadBalancer.java:273)
> 	at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.createCluster(BaseLoadBalancer.java:1113)
> 	at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.randomAssignment(BaseLoadBalancer.java:1175)
> 	at org.apache.hadoop.hbase.master.balancer.BaseLoadBalancer.immediateAssignment(BaseLoadBalancer.java:1145)
> 	at org.apache.hadoop.hbase.master.balancer.TestBaseLoadBalancer.testImmediateAssignment(TestBaseLoadBalancer.java:136)
> {code}
> One possible fix is to submit CachedDNSToSwitchMapping.resolve() to executor pool for execution. RackManager.getRack() can set a timeout beyond which UNKNOWN_RACK is returned.



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