Tuesday, January 14, 2014

Solr Cloud zkCli.sh set clusterstate.json

Well, if you have ever spent two hours doing something completely wrong then you know where I have been today.

I have a Solr Cloud configuration with three shards and no replicas at this time. I am inserting documents then pausing and doing some load tests, then inserting more, until I get to 5 billion.

Well, the linux boxes running Solr and Zookeeper were restarted and Solr was restarted before Zookeeper. Then when Zookeeper was restarted somehow the clusterstate.json was updated so that I now had 1 shard with 2 replicas.

So, all I need to do is fix the clusterstate.json. I stop the Solr instances and go to work. Fortunately I have a copy of the clusterstate.json and I highly recommend saving a copy of your clusterstate.json somewhere safe.

Here is where the trouble starts.

I had found online that you just have to set the clusterstate.json. I assume that you can do this from the zkCli command prompt.

So, I run zkCli.sh and at the prompt I try this:
set /clusterstate.json "`cat /local/path/to/clusterstate.json`"

I get a java NumberFormat Exception.

I tried escaping quotes in the json, removing line feeds, everything I could think of.

Well, long story short, you don't do the command from the zkCli command prompt.

You run the command in your shell/console.

I now do this from the zookeeper bin directory:

#sh zkCli.sh -server 127.0.0.1:2181 set /clusterstate.json "`cat /local/path/to/clusterstate.json`"

Everything worked great.

So, if you are trying to set the clusterstate.json while in ZkCli.sh  you will get this error:

zkcli Command failed: java.lang.NumberFormatException: For input string:

Don't run it inside of ZkCli.sh, run the command from the shell.

3 comments:

baalel said...

many thanks. Solved a headache I was having.

Chad Zezula said...

Thanks! This saved me a lot of time.

Martin Spielmann said...

Thank you! Helped a lot