> 2010-01-19 09:27:48,382 WARN > org.apache.hadoop.hbase.regionserver.HLog: IPC Server handler 4 on > 60020 took 1338ms appending an edit to hlog; editcount=222803
This usually means that your HDFS is a tad slow, probably very loaded. > 2010-01-19 09:28:05,251 INFO org.apache.hadoop.ipc.HBaseServer: IPC > Server handler 4 on 60020 caught: > java.nio.channels.ClosedChannelException > at > sun.nio.ch.SocketChannelImpl.ensureWriteOpen(SocketChannelImpl.java:126) > at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:324) > at > org.apache.hadoop.hbase.ipc.HBaseServer.channelWrite(HBaseServer.java:1125) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Responder.processResponse(HBaseServer.java:615) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Responder.doRespond(HBaseServer.java:679) > at > org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:943) This happens when a client (like a mapreduce task) gets killed while the operation is happening on the region server. J-D
