FW: Large number of HTTP requests to Solr-5.2.1 throwing errors

-----Original Message-----
From: Shawn Heisey [mailto:apache@elyograg.org]
Sent: 10 March 2018 01:23
To: solr-user@lucene.apache.org
Subject: Re: Large number of HTTP requests to Solr-5.2.1 throwing errors

On 3/8/2018 1:21 PM, Deeksha Sharma wrote:
> Version of Solr : Solr-5.2.1
> I am sending large number of HTTP GET requests to Solr server for querying
indexes. These requests to Solr are generated via a Node.js service.
>
> When the number of requests to Solr are ~250, I am intermittently facing
these kinds of issues:
>
> * Some times Socket hang up
> * Sometimes Solr-server doesn't respond and send back HTTP 500.
> * At times I have received error of ECONNRESET -> indicating that TCP
connection on the other side closed abruptly.
>
> I wanted to know if there is a way to indicate to Solr that it needs to
keep the connective alive or there is a way to send solr server large number
of query requests.

We need to know exactly what is happening from Solr's point of view. Can you
please share your solr.log file, making sure that it covers the time of the
errors?  Chances are very good that if you try to attach that file to an
email reply that the mailing list will eat the attachment, so it's better if
you use a paste website or a file sharing website and give us a URL for
accessing it.  Dropbox and Gist tend to be good choices.

Whenever Solr sends back an error response, like a 500, there should be
something in the solr.log that provides more detail about what went wrong.

There is not typically anything in the log file that's particularly
sensitive, but if you do find something you don't want to share, feel free
to redact it.  But take care to ensure that the redaction is as small as
possible, and that it is possible for us to tell one bit of redacted
information apart from others.

Thanks,
Shawn