https://community.cloudera.com/t5/Archives-of-Support-Questions/Replica-Not-Found-errors-after-CDH-5-3-1-1-upgrade/m-p/24392#M4869 <P>After upgrading from 5.2.1 to 5.3.1 we are seeing EXT4 errors on our HDFS/Yarm Manager nodes:</P><P>&nbsp;</P><PRE>DatanodeRegistration(10.15.129.105, datanodeUuid=d2f178f8-1399-4330-92b9-c627b0a04804, infoPort=50075, ipcPort=50020, storageInfo=lv=-56;cid=cluster15;nsid=601399481;c=0):Got exception while serving BP-447169353-10.15.129.109-1415094554153:blk_1110216188_36477305 to /10.15.129.103:56258 org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-447169353-10.15.129.109-1415094554153:blk_1110216188_36477305</PRE><P>&nbsp;</P><P>The upgrade did not throw any exceptions and "hdfs fsck /" is clean. How can I flush these out of the system? Maybe these are files that did not have time to replicate properly before the upgrade?</P> Fri, 16 Sep 2022 09:21:00 GMT wsanders 2022-09-16T09:21:00Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Replica-Not-Found-errors-after-CDH-5-3-1-1-upgrade/m-p/24392#M4869 <P>After upgrading from 5.2.1 to 5.3.1 we are seeing EXT4 errors on our HDFS/Yarm Manager nodes:</P><P>&nbsp;</P><PRE>DatanodeRegistration(10.15.129.105, datanodeUuid=d2f178f8-1399-4330-92b9-c627b0a04804, infoPort=50075, ipcPort=50020, storageInfo=lv=-56;cid=cluster15;nsid=601399481;c=0):Got exception while serving BP-447169353-10.15.129.109-1415094554153:blk_1110216188_36477305 to /10.15.129.103:56258 org.apache.hadoop.hdfs.server.datanode.ReplicaNotFoundException: Replica not found for BP-447169353-10.15.129.109-1415094554153:blk_1110216188_36477305</PRE><P>&nbsp;</P><P>The upgrade did not throw any exceptions and "hdfs fsck /" is clean. How can I flush these out of the system? Maybe these are files that did not have time to replicate properly before the upgrade?</P> Fri, 16 Sep 2022 09:21:00 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Replica-Not-Found-errors-after-CDH-5-3-1-1-upgrade/m-p/24392#M4869 wsanders 2022-09-16T09:21:00Z https://community.cloudera.com/t5/Archives-of-Support-Questions/Replica-Not-Found-errors-after-CDH-5-3-1-1-upgrade/m-p/24442#M4870 <P>These errors (in HDFS logs not EXT4 errors in syslog) went away after about an hour.</P> Fri, 06 Feb 2015 23:48:13 GMT https://community.cloudera.com/t5/Archives-of-Support-Questions/Replica-Not-Found-errors-after-CDH-5-3-1-1-upgrade/m-p/24442#M4870 wsanders 2015-02-06T23:48:13Z