There will probably come a time when you want to do something not readily covered in Solr's APIs. Manually editing the clusterstate.json is easy to do but should be approached with caution.
I wanted to drop all shards from a single host from my Solr cluster (didn't care about losing the data) and do a little spring cleaning. To open a command-line interface with ZK:
/path/to/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181
Then simply:
get /clusterstate.json
Place that content into a local file. After backing up the original content, make your edits. For instance, to drop the dead nodes, delete JSON elements with "down" states:
To upload your new clusterstate.json (no need to halt services):
/path/to/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181 set /clusterstate.json "`cat /local/path/to/clusterstate.json`"
Thank you, this helped a lot.
ReplyDeleteIf we change zookeeper settings like above, do we need to change Solr settings manually? If so how can we do it.
Currently I changed leader settings in Zookeeper but Solr is reporting its not the Leader.
Sorry, never tried to change the leader manually so I don't know. I used to worry about who was the leader or the replica but then realized it didn't matter (at least for me).
DeleteUploading new clusterstate.json with
ReplyDelete/path/to/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181 set /clusterstate.json "`cat /local/path/to/clusterstate.json`"
did not work, but
/path/to/zookeeper/bin/zkCli.sh -server 127.0.0.1:2181 set /clusterstate.json "$(< /local/path/to/clusterstate.json)"
worked.
谢谢,我们集群中有个分片莫名奇妙就处于recovring状态,重启之后也没有用,但是日志中并不能发现什么显著错误,按照你的方法,我们手动更新了zookeeper中clusterstate.json,好使了.
ReplyDelete再次感谢
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