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From "Yonik Seeley (JIRA)" <>
Subject [jira] Commented: (SOLR-2158) TestDistributedSearch.testDistribSearch fails often
Date Sun, 05 Dec 2010 15:36:10 GMT


Yonik Seeley commented on SOLR-2158:

OK, so we upgraded jetty... but the "failed to respond" exception still happens.
Just to try and narrow things down, I put a long sleep inside solr request handling and then
tried a distributed search... it worked fine. So
it doesn't appear to be something getting hung up in Solr.

- a jetty bug
- an embedded jetty bug
- a HttpClient bug
- a bug in the way solr uses HttpClient

Another data point: with my load testing tool, I can run millions of requests against Jetty/Solr
(and I just did again). It doesn't use HttpClient though, and it uses GET instead of POST.

Some things to try:
 - Modify the load tool to use POST and verify things still work
 - Put a long pause in TestDistributedSearch after the solr servers are brought up, and then
try load testing against those servers w/ an external tool.
   - if this fails, we know it's an issue with how we embed Jetty
- Make a load testing tool that uses SolrJ exactly the way that distributed search uses it,
and try it on a normal Solr server
   - if this fails, ti could be an HttpClient bug, or a jetty bug tickled by HttpClient specifically
   - if this fails, make a small self-contained load tool that uses only HttpClient to remove
the possibility of SolrJ bugs 

> TestDistributedSearch.testDistribSearch fails often
> ---------------------------------------------------
>                 Key: SOLR-2158
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>          Components: Build
>    Affects Versions: 3.1, 4.0
>         Environment: Hudson
>            Reporter: Robert Muir
>             Fix For: 3.1, 4.0
>         Attachments: TEST-org.apache.solr.TestDistributedSearch.txt
> TestDistributedSearch.testDistribSearch fails often in hudson, with some threads throwing
uncaught exceptions.

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