Hi.  I'm new to hadoop and Cloudera.  I have a 5 node cluster with 3 data nodes.  I have a third party client program that is opening hdfs files and sending them data as it arrive in a stream.  On a timer, every 10 min, the client closes the files and opens new ones for writing.  Before the close can happen, the datanode socket connection times out with this error: 2016-05-10 14:17:20,165 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Exception for BP-1298278955-172.31.1.79-1461125109305:blk_1073807048_66356 java.net.SocketTimeoutException: 60000 millis timeout while waiting for channel to be ready for read. ch : java.nio.channels.SocketChannel[connected local=/172.31.15.196:50010 remote=/172.31.1.81:57017] at org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164) at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:161) at org.apache.hadoop.net.SocketInputStream.read(SocketInputStream.java:131) at java.io.BufferedInputStream.fill(BufferedInputStream.java:235) at java.io.BufferedInputStream.read1(BufferedInputStream.java:275) at java.io.BufferedInputStream.read(BufferedInputStream.java:334) at java.io.DataInputStream.read(DataInputStream.java:149) at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:199) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doReadFully(PacketReceiver.java:213) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:134) at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:109) at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:500) at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:894) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:794) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:169) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:106) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:246)   Question: How do I change the 60000 milis setting to a larger value?   I've tried dfs.datanode.socket.write.timeout and dfs.socket.timeout in hdfs config through Cloudera admin with config redeploy and cluster restart.  I've also tried adding these and dfs.client.socket-timeout in hdfs-client.xml on the client side.  Nothing seems to affect the used value.   Thanks in advance. -Bruce ... View more