https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334350#M231730 <P>I think the DataNode is restarting and scan blocks? <SPAN>It will return to normal when&nbsp;hen the block scan is complete.</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Meepoljd_0-1642754410010.png" style="width: 400px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/33220i2FFE9A81D28393DD/image-size/medium?v=v2&amp;px=400" role="button" title="Meepoljd_0-1642754410010.png" alt="Meepoljd_0-1642754410010.png" /></span></P><P>You can test it again w<SPAN>hen the following content appears in the log</SPAN></P><P><SPAN>2022-01-17 22:41:56,564 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Time to add replicas to map for block pool BP-1115033092-xx.xx.xx.xx-1532155849771 on volume /data4/xxx/hdfs/dfs/data/current: 5270395ms</SPAN></P><P>&nbsp;</P><P>&nbsp;</P> Fri, 21 Jan 2022 08:43:05 GMT Meepoljd 2022-01-21T08:43:05Z https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334348#M231729 <PRE>ip:9866:DataXceiver error processing WRITE_BLOCK operation src: /ip:30458 dst: /ip:9866 java.io.EOFException: Unexpected EOF while trying to read response from server at org.apache.hadoop.hdfs.protocolPB.PBHelperClient.vintPrefixed(PBHelperClient.java:539) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:846) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:173) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:107) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:291) at java.lang.Thread.run(Thread.java:748)</PRE><P>&nbsp;</P><PRE>ip:9866:DataXceiver error processing WRITE_BLOCK operation src: /ip:46217 dst: /ip:9866 java.io.IOException: Not ready to serve the block pool, BP-711568456-10.13.6.7-1597913882399. at org.apache.hadoop.hdfs.server.datanode.DataXceiver.checkAndWaitForBP(DataXceiver.java:1402) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.checkAccess(DataXceiver.java:1418) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:715) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:173) at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:107) at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:291) at java.lang.Thread.run(Thread.java:748)</PRE><P>&nbsp;</P><P>&nbsp;</P><P>This problem has been bothering me. What direction should I check</P> Fri, 21 Jan 2022 07:58:49 GMT https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334348#M231729 wallace-x 2022-01-21T07:58:49Z https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334350#M231730 <P>I think the DataNode is restarting and scan blocks? <SPAN>It will return to normal when&nbsp;hen the block scan is complete.</SPAN></P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Meepoljd_0-1642754410010.png" style="width: 400px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/33220i2FFE9A81D28393DD/image-size/medium?v=v2&amp;px=400" role="button" title="Meepoljd_0-1642754410010.png" alt="Meepoljd_0-1642754410010.png" /></span></P><P>You can test it again w<SPAN>hen the following content appears in the log</SPAN></P><P><SPAN>2022-01-17 22:41:56,564 INFO org.apache.hadoop.hdfs.server.datanode.fsdataset.impl.FsDatasetImpl: Time to add replicas to map for block pool BP-1115033092-xx.xx.xx.xx-1532155849771 on volume /data4/xxx/hdfs/dfs/data/current: 5270395ms</SPAN></P><P>&nbsp;</P><P>&nbsp;</P> Fri, 21 Jan 2022 08:43:05 GMT https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334350#M231730 Meepoljd 2022-01-21T08:43:05Z https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334622#M231832 <P>You mean I can ignore this mistake, righ，However, this is an error, which will affect my cluster. I should check how it is caused</P> Thu, 27 Jan 2022 07:49:10 GMT https://community.cloudera.com/t5/Support-Questions/DataXceiver-error-processing-WRITE-BLOCK-operation/m-p/334622#M231832 wallace-x 2022-01-27T07:49:10Z