/************************************************************
SHUTDOWN_MSG: Shutting down JobTracker at uvm12dk/172.16.4.147
************************************************************/
2012-01-18 23:08:07,931 ERROR org.apache.hadoop.hdfs.DFSClient: Exception closing file /vol/double/hadoop-root/mapred/system/jobtracker.info : java.net.SocketException: Too many open files
java.net.SocketException: Too many open files
	at sun.nio.ch.Net.socket0(Native Method)
	at sun.nio.ch.Net.socket(Net.java:97)
	at sun.nio.ch.SocketChannelImpl.<init>(SocketChannelImpl.java:84)
	at sun.nio.ch.SelectorProviderImpl.openSocketChannel(SelectorProviderImpl.java:37)
	at java.nio.channels.SocketChannel.open(SocketChannel.java:105)
	at org.apache.hadoop.net.StandardSocketFactory.createSocket(StandardSocketFactory.java:58)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.createBlockOutputStream(DFSClient.java:2868)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2826)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102)
	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)