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https://issues.apache.org/jira/browse/HBASE-12263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Liu Shaohui updated HBASE-12263:
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Attachment: HBASE-12263-v1.diff
Throw an exception when hostname is set to localhost in a distributed cluster.
> RegionServer listens on localhost in distributed cluster when DNS is
> unavailable
> --------------------------------------------------------------------------------
>
> Key: HBASE-12263
> URL: https://issues.apache.org/jira/browse/HBASE-12263
> Project: HBase
> Issue Type: Bug
> Reporter: Liu Shaohui
> Priority: Minor
> Attachments: HBASE-12263-v1.diff
>
>
> When DNS is unavailable, the new started regionservers will listen on
> localhost(127.0.0.1) in a distributed cluster, which results that the hmaster
> will fail to assign regions to those regionservers.
> {quote}
> 2014-10-15,04:26:42,273 WARN org.apache.hadoop.net.DNS: Unable to determine
> local hostname -falling back to "localhost"
> java.net.UnknownHostException: xx-hadoop-srv-st01.bj: xx-hadoop-srv-st01.bj
> at java.net.InetAddress.getLocalHost(InetAddress.java:1360)
> at org.apache.hadoop.net.DNS.resolveLocalHostname(DNS.java:260)
> at org.apache.hadoop.net.DNS.<clinit>(DNS.java:58)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.<init>(HRegionServer.java:472)
> {quote}
> {quote}
> $ netstat -nap | grep 13748
> tcp 0 0 127.0.0.1:12610 0.0.0.0:*
> LISTEN 13748/java
> tcp 0 0 0.0.0.0:12611 0.0.0.0:*
> LISTEN 13748/java
> {quote}
> In this situation, I think we shoud throw an exception and make the startup
> of regionservers failed.
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