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From Sachin Kale <sachinpk...@gmail.com>
Subject Master-Slave setup using SolrCloud
Date Thu, 02 Oct 2014 12:58:33 GMT
Hello,

We are trying to move our traditional master-slave Solr configuration to
SolrCloud. As our index size is very small (around 1 GB), we are having
only one shard.
So basically, we are having same master-slave configuration with one leader
and 6 replicas.
We are experimenting with maxTime of both AutoCommit and AutoSoftCommit.
Currently, autoCommit maxTime is 15 minutes and autoSoftCommit is 1 minute
(Let me know if these values does not make sense).

Caches are set such that warmup time is at most 20 seconds.

We are having continuous indexing requests mostly for updating the existing
documents. Few requests are for deleting/adding the documents.

The problem we are facing is that we are getting very frequent
NullPointerExceptions.
We get continuous 200-300 such exceptions within a period of 30 seconds and
for next few minutes, it works fine.

Stacktrace of NullPointerException:

*ERROR - 2014-10-02 18:09:38.464; org.apache.solr.common.SolrException;
null:java.lang.NullPointerException*
*        at
org.apache.solr.handler.component.QueryComponent.returnFields(QueryComponent.java:1257)*
*        at
org.apache.solr.handler.component.QueryComponent.handleRegularResponses(QueryComponent.java:720)*
*        at
org.apache.solr.handler.component.QueryComponent.handleResponses(QueryComponent.java:695)*

‚Äč
I am not sure what would be causing it. My guess, whenever, it is trying to
replay tlog, we are getting these exceptions. Is anything wrong in my
configuration?


-Sachin-

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