Master node unable to bind to DNS hostname
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Key: HADOOP-1638
URL: https://issues.apache.org/jira/browse/HADOOP-1638
Project: Hadoop
Issue Type: Bug
Components: contrib/ec2
Affects Versions: 0.13.0, 0.13.1, 0.14.0, 0.15.0
Reporter: Stu Hood
Priority: Minor
With a release package of Hadoop 0.13.0 or with latest SVN, the Hadoop
contrib/ec2 scripts fail to start Hadoop correctly. After working around issues
HADOOP-1634 and HADOOP-1635, and setting up a DynDNS address pointing to the
master's IP, the ec2/bin/start-hadoop script completes.
But the cluster is unusable because the namenode and tasktracker have not
started successfully. Looking at the namenode log on the master reveals the
following error:
#2007-07-19 16:54:53,156 ERROR org.apache.hadoop.dfs.NameNode:
java.net.BindException: Cannot assign requested address
# at sun.nio.ch.Net.bind(Native Method)
# at
sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:119)
# at sun.nio.ch.ServerSocketAdaptor.bind(ServerSocketAdaptor.java:59)
# at org.apache.hadoop.ipc.Server$Listener.<init>(Server.java:186)
# at org.apache.hadoop.ipc.Server.<init>(Server.java:631)
# at org.apache.hadoop.ipc.RPC$Server.<init>(RPC.java:325)
# at org.apache.hadoop.ipc.RPC.getServer(RPC.java:295)
# at org.apache.hadoop.dfs.NameNode.init(NameNode.java:164)
# at org.apache.hadoop.dfs.NameNode.<init>(NameNode.java:211)
# at org.apache.hadoop.dfs.NameNode.createNameNode(NameNode.java:803)
# at org.apache.hadoop.dfs.NameNode.main(NameNode.java:811)
The master node refuses to bind to the DynDNS hostname in the generated
hadoop-site.xml. Here is the relevant part of the generated file:
#<property>
# <name>fs.default.name</name>
# <value>blah-ec2.gotdns.org:50001</value>
#</property>
#
#<property>
# <name>mapred.job.tracker</name>
# <value>blah-ec2.gotdns.org:50002</value>
#</property>
I'll attach a patch against hadoop-trunk that fixes the issue for me, but I'm
not sure if this issue is something that someone can fix more thoroughly.
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