Have you checked memory/swap ?

On 21/10/2011, Ronald Müller <ronald.mueller_at_gmail.com> wrote:
> Dear mailing list members!
>
> I have a script that sends index requests to a search engine. This is done
> for > 50.000 documents using HTTP requests. Before this script transfers the
> document data to the search engine, it first sends a HTTP request to the
> status URL of the search engine. This must be done before for each document
> before sending the data.
>
> My script uses Curl (7.22.0) to send the status requests. For all 50.000
> documents this is done very fast in a short time range. On most systems this
> works without any problems. But there is one system my curl command
> sometimes hangs. Then it doesn't return or gets a timeout. It just hangs.
> The problem even occurs if the search engine doesn't run (and the requested
> port isn't available).
>
> Here is a (very) simplified version of my script. On most of my systems this
> script runs without any problems and without hang. But on the one system
> this test script hangs after a while, even if the requested host/port isn't
> available/open.
>
> Do you have a hint what could cause the hang on the problematic system?
>
> #!/bin/bash
>
> for i in {1..100000} ; do
> echo "Cycle: $i"
> curl -transfer http://localhost:11111/port/does/not/exist
> done
>
>
> ###
>
> Output of the script
> ..
> ..
> Cycle: 15973
> curl: (7) couldn't connect to host
> Cycle: 15974
> curl: (7) couldn't connect to host
> Cycle: 15975
> curl: (7) couldn't connect to host
> Cycle: 15976
> curl: (7) couldn't connect to host
>
> GET /port/does/not/exist/ HTTP/1.1
> User-Agent: curl/7.22.0 (i686-redhat-linux-gnu) libcurl/7.22.0
> OpenSSL/0.9.8b zlib/1.2.3 libidn/0.6.5
> Host: localhost:11111
> Accept: */*
>
> --> Here the script just hangs and doesn't return.
>

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Received on 2011-10-21