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From Markus Jelsma <markus.jel...@openindex.io>
Subject Re: what would cause large numbers of executeWithRetry INFO messages?
Date Tue, 18 Jan 2011 18:25:31 GMT
Hi,

This is a slave polling the master for its index version but it seems the 
master fails to respond.

From the javadoc:
> public class NoHttpResponseException
> extends IOException
> 
> Signals that the target server failed to respond with a valid HTTP
> response.

Cheers,

> I see a large number (~1000) of the following executeWithRetry messages in
> my apache catalina log files every day (see bolded snippet below).  They
> seem to appear at random intervals.
> 
> Since they are not flagged as errors or warnings, I have been ignoring them
> for now.  However, I started wondering if "INFO" message is a red-herring
> and thinking there might be an actual problem somewhere.
> 
> Does anyone know what would cause this type of message?  Are they normal? 
> I have not seen anything in my google searches for solr that contain this
> message
> 
> Details:
> 
> 1. My CPU usage seems fine as does my heap; we have lots of cpu capacity
> and heap space
> 2. The log is from a searcher but I know that the intervals do not
> correspond to replication (every 15 min on the hour)
> 3. the INFO lines appear in all searcher logs (we have a number of
> searchers)
> 4. the data is around 10m records per searcher and occupies around 14gb
> 5. I am not noticing any problems performing queries on the solr (so no
> trace info to give you); performance and queries seem fine
> 
> Log snippet:
> Sep 10, 2010 2:17:59 AM org.apache.solr.handler.SnapPuller fetchLatestIndex
> INFO: Slave in sync with master.
> Sep 10, 2010 2:18:20 AM org.apache.commons.httpclient.HttpMethodDirector
> executeWithRetry
> INFO: I/O exception (org.apache.commons.httpclient.NoHttpResponseException)
> caught when processing request: The server xxx.admin.inf failed to respond
> Sep 10, 2010 2:18:20 AM org.apache.commons.httpclient.HttpMethodDirector
> executeWithRetry
> INFO: Retrying request
> Sep 10, 2010 2:18:20 AM org.apache.solr.handler.SnapPuller fetchLatestIndex
> INFO: Slave in sync with master.
> 
> any info appreciated.  thx

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