There is a jira ticket describing your situation https://issues.apache.org/jira/plugins/servlet/mobile#issue/CASSANDRA-14793
I may be wrong but is seems that system directories are pinned to first data directory in cassandra.yaml by default. When you removed first item from the list system data regenerated in the new first directory in the list. And then merged??? when original first dir returned On Fri, Jan 7, 2022 at 4:23 PM Joe Obernberger <joseph.obernber...@gmail.com> wrote: > Hi - in order to get the node back up and running I did the following: > Deleted all data on the node: > Added: -Dcassandra.replace_address=172.16.100.39 > to the cassandra.env.sh file, and started it up. It is currently > bootstrapping. > > In cassandra.yaml, say you have the following: > > data_file_directories: > - /data/1/cassandra > - /data/2/cassandra > - /data/3/cassandra > - /data/4/cassandra > - /data/5/cassandra > - /data/6/cassandra > - /data/7/cassandra > - /data/8/cassandra > > If I change the above to: > # - /data/1/cassandra > - /data/2/cassandra > - /data/3/cassandra > - /data/4/cassandra > - /data/5/cassandra > - /data/6/cassandra > - /data/7/cassandra > - /data/8/cassandra > > the problem happens. If I change it to: > > - /data/1/cassandra > - /data/2/cassandra > - /data/3/cassandra > - /data/4/cassandra > - /data/5/cassandra > - /data/6/cassandra > - /data/7/cassandra > # - /data/8/cassandra > > the node starts up OK. I assume it will recover the missing data during a > repair? > > -Joe > On 1/7/2022 4:13 PM, Mano ksio wrote: > > Hi, you may have already tried, but this may help. > https://stackoverflow.com/questions/29323709/unable-to-start-cassandra-node-already-exists > > can you be little narrate 'If I remove a drive other than the first one'? > what does it means > > On Fri, Jan 7, 2022 at 2:52 PM Joe Obernberger < > joseph.obernber...@gmail.com> wrote: > >> Hi All - I have a 13 node cluster running Cassandra 4.0.1. If I stop a >> node, edit the cassandra.yaml file, comment out the first drive in the >> list, and restart the node, it fails to start saying that a node already >> exists in the cluster with the IP address. >> >> If I put the drive back into the list, the node still fails to start >> with the same error. At this point the node is useless and I think the >> only option is to remove all the data, and re-boostrap it? >> --------- >> >> ERROR [main] 2022-01-07 15:50:09,155 CassandraDaemon.java:909 - >> Exception encountered during startup >> java.lang.RuntimeException: A node with address /172.16.100.39:7000 >> already exists, cancelling join. Use cassandra.replace_address if you >> want to replace this node. >> at >> >> org.apache.cassandra.service.StorageService.checkForEndpointCollision(StorageService.java:659) >> at >> >> org.apache.cassandra.service.StorageService.prepareToJoin(StorageService.java:934) >> at >> >> org.apache.cassandra.service.StorageService.initServer(StorageService.java:784) >> at >> >> org.apache.cassandra.service.StorageService.initServer(StorageService.java:729) >> at >> >> org.apache.cassandra.service.CassandraDaemon.setup(CassandraDaemon.java:420) >> at >> >> org.apache.cassandra.service.CassandraDaemon.activate(CassandraDaemon.java:763) >> at >> >> org.apache.cassandra.service.CassandraDaemon.main(CassandraDaemon.java:887) >> >> ----------- >> >> If I remove a drive other than the first one, this problem doesn't >> occur. Any other options? It appears that if it the first drive in the >> list goes bad, or is just removed, that entire node must be replaced. >> >> -Joe >> >> > > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > Virus-free. > www.avg.com > <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> > <#m_3361535422621871688_DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > >
