the datanode crashes if it starts before the namenode
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Key: HADOOP-282
URL: http://issues.apache.org/jira/browse/HADOOP-282
Project: Hadoop
Type: Bug
Components: dfs
Versions: 0.3.1
Reporter: Owen O'Malley
Assigned to: Owen O'Malley
Priority: Critical
Fix For: 0.3.2
Attachments: data-node-first.patch
If the datanode tries to register before the namenode is offering service, it
crashes with a uncaught exception.
java.net.ConnectE
xception: Connection refused
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:507)
at java.net.Socket.connect(Socket.java:457)
at java.net.Socket.<init>(Socket.java:365)
at java.net.Socket.<init>(Socket.java:207)
at org.apache.hadoop.ipc.Client$Connection.<init>(Client.java:112)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:351)
at org.apache.hadoop.ipc.Client.call(Client.java:289)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:150)
at org.apache.hadoop.dfs.$Proxy0.register(Unknown Source)
at org.apache.hadoop.dfs.DataNode.register(DataNode.java:176)
at org.apache.hadoop.dfs.DataNode.<init>(DataNode.java:109)
at org.apache.hadoop.dfs.DataNode.makeInstanceForDir(DataNode.java:892)
at org.apache.hadoop.dfs.DataNode.run(DataNode.java:846)
at org.apache.hadoop.dfs.DataNode.runAndWait(DataNode.java:862)
at org.apache.hadoop.dfs.DataNode.main(DataNode.java:917)
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