Hi All, We have a standard active/standby hdfs setup, and everything looks working well by now.
The question is that, on the standby namenode, we are seeing in most of cases it fetches edits log from 2 journal nodes; but it also happens that it loads edits from all the 3 journal nodes sometimes, and we don't see there's a rule-like based on the logging time. So what's the difference between the 2 behaviors? # cat /var/log/hadoop-hdfs/hadoop-hdfs-namenode-$HOSTNAME.log | grep -i "Start loading edits" ++++ from 3 journal nodes: jn03, jn01, jn02 2015-11-12 12:01:43,296 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Start loading edits file http://jn03:8480/getJournal?jid=thewalking&segmentTxId=43974&storageInfo=-55%3A1852321099%3A0%3ACID-dd00c4ee-90c6-4ff0-9157-59d6645d0ed7, http://jn01:8480/getJournal?jid=thewalking&segmentTxId=43974&storageInfo=-55%3A1852321099%3A0%3ACID-dd00c4ee-90c6-4ff0-9157-59d6645d0ed7, http://jn02:8480/getJournal?jid=thewalking&segmentTxId=43974&storageInfo=-55%3A1852321099%3A0%3ACID-dd00c4ee-90c6-4ff0-9157-59d6645d0ed7 ++++ from 2 journal nodes: jn01, jn03 2015-11-12 12:03:44,512 INFO org.apache.hadoop.hdfs.server.namenode.FSImage: Start loading edits file http://jn01:8480/getJournal?jid=thewalking&segmentTxId=44088&storageInfo=-55%3A1852321099%3A0%3ACID-dd00c4ee-90c6-4ff0-9157-59d6645d0ed7, http://jn02:8480/getJournal?jid=thewalking&segmentTxId=44088&storageInfo=-55%3A1852321099%3A0%3ACID-dd00c4ee-90c6-4ff0-9157-59d6645d0ed7 Thanks, Du
