I had seen this issue. and it was due to data nodes not able to process those many requests at a time.
On Thu, Jun 4, 2015 at 11:14 AM, Arpit Agarwal <aagar...@hortonworks.com> wrote: > I recall seeing this error due to a network misconfiguration. You may > want to verify that IP addresses and host names are correctly setup. > > From: Caesar Samsi > Reply-To: "user@hadoop.apache.org" > Date: Wednesday, June 3, 2015 at 8:07 PM > To: "user@hadoop.apache.org" > Subject: ack with firstBadLink as 192.168.1.12:50010? > > I’ve just built my distributed cluster but am getting the following > error when I try to use HDFS. > > > > I’ve traced it by telnet to 192.168.1.12 50010 and it just waits there > waiting for a connection but never happens. > > > > If I telnet on that host using localhost (127.0.0.1) the telnet connection > happens immediately. > > > > What could be the cause? > > > > >> > > > > hduser@hadoopmaster ~/hadoop $ hdfs dfs -copyFromLocal input input > > 15/06/03 20:03:36 INFO hdfs.DFSClient: Exception in createBlockOutputStream > > java.io.IOException: Got error, status message , ack with firstBadLink as > 192.168.1.12:50010 > > at > org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil.checkBlockOpStatus(DataTransferProtoUtil.java:140) > > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.createBlockOutputStream(DFSOutputStream.java:1334) > > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1237) > > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449) > > 15/06/03 20:03:36 INFO hdfs.DFSClient: Abandoning > BP-101149352-192.168.1.10-1433386347922:blk_1073741829_1005 > > 15/06/03 20:03:36 INFO hdfs.DFSClient: Excluding datanode > DatanodeInfoWithStorage[192.168.1.12:50010 > ,DS-1347a6fe-6bad-4df8-88cb-21378b847839,DISK] > > 15/06/03 20:03:36 WARN hdfs.DFSClient: Slow waitForAckedSeqno took 70947ms > (threshold=30000ms) >