Liu Shaohui created HBASE-12263:
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Summary: 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
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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