2017-07-21 18:20:57,953 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: BlockSender.sendChunks() exception:
java.io.IOException: Connection timed out
at sun.nio.ch.FileChannelImpl.transferTo0(Native Method)
at sun.nio.ch.FileChannelImpl.transferToDirectlyInternal(FileChannelImpl.java:416)
at sun.nio.ch.FileChannelImpl.transferToDirectly(FileChannelImpl.java:481)
at sun.nio.ch.FileChannelImpl.transferTo(FileChannelImpl.java:596)
at org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:223)
at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendPacket(BlockSender.java:578)
at org.apache.hadoop.hdfs.server.datanode.BlockSender.doSendBlock(BlockSender.java:758)
at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:705)
at org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:544)
at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:148)
at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:103)
at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:244)
at java.lang.Thread.run(Thread.java:745)