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From Karl Wright <>
Subject Re: Manifold RSS connector gets "stuck" after a few docs are processed
Date Thu, 08 Mar 2018 14:41:45 GMT
Hi Mike,

You are the third person this morning that has reported this in conjunction
with Postgresql.  It is possible that some behavior we count on broke in
the latest postgresql release.  Can you tell me what version you are
using?  Do you see the same behavior when you run with the built-in HSQLDB


On Thu, Mar 8, 2018 at 9:32 AM, Mike Hugo <> wrote:

> Hello,
> I set up a new manifold instance based on the simple example.  I modified
> properties.xml to point to a postgresql database and then set it up to read
> an RSS feed.  It uses a custom output connector to send the data to a
> custom API.
> I've noticed that it starts properly, but it only pulls in 3 or 4 records
> before it "hangs" and doesn't pull in more docs after that.  If I bounce
> the server then it will pull in 3 or 4 more docs, but then seems to hang
> again.
> I can add a new RSS feed and start it, but it won't pull in any documents
> until the server is bounced.
> I increased the value of org.apache.manifoldcf.crawler.threads and that
> seems to help, but it just delays the same behavior.  For example, it might
> pull in 10 or 15 docs, but then stops pulling them in again.  No messages
> in the logs.
> It does appear that it's spawning many many of these threads:
> ExecuteQueryThread
> Any ideas where to start looking or how to debug why it hangs after only a
> few documents?
> Thanks!!
> Mike

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