https://community.cloudera.com/t5/Support-Questions/Datanode-Failures-DataXceiver-error-processing-WRITE-BLOCK/m-p/173843#M136106 <P>I have been experiencing failures with my datanodes and the error is <EM><STRONG>WRITE_BLOCK</STRONG></EM> and <EM><STRONG>READ_BLOCK</STRONG></EM>. I have checked the data handlers and i have dfs.datanode.max.transfer.threads set to 16384. I run HDP 2.4.3 with 11 nodes. Please see error below;</P><PRE>2017-03-24 10:09:59,749 ERROR datanode.DataNode (DataXceiver.java:run(278)) - dn:50010:DataXceiver error processing READ_BLOCK operation src: /ip_address:49591 dst: /ip_address:50010 2017-03-24 11:02:18,750 ERROR datanode.DataNode (DataXceiver.java:run(278)) - dn:50010:DataXceiver error processing WRITE_BLOCK operation src: /ip_address:43052 dst: /ip_address:50010 </PRE> Sat, 25 Mar 2017 03:44:05 GMT joshua_adeleke 2017-03-25T03:44:05Z