Hi Sean,
DSpace blocks until it can store the usage event (i.e. download,
collection-page view) before completing the action, i.e. serving a file.
So, if you are using SOLR or Elastic Search, the first time after a tomcat
restart, it has to wait until that service is ready. In your case, this is
likely a new-for-DSpace-5 feature, of Google Analytics Statistics, as
opposed to normal Google-Analytics-Tracker-Code that was asynchronous ajax
in XMLUI/JSPUI html.
I would check config/xmlui.xconf, having this commented out, should be your
best way to avoid this slowdown (but GA won't track that statistics).
https://github.com/DSpace/DSpace/blob/master/dspace/config/xmlui.xconf#L103
<!-- Additionally you may choose to expose your Google Analytics statistics
in DSpace -->
<!-- <aspect name="StatisticsGoogleAnalytics"
path="resource://aspects/StatisticsGoogleAnalytics/" /> -->
Lastly, ideally, DSpace shouldn't block the action, to store some metrics.
Maybe the developers can revisit this, to ensure some background thread
performs this. When I completely turn off statistics, DSpace is a much
faster work horse, with too many turned on, or if they're misconfigured,
then slow downs are more normal. Also, another thing to think about is log
analysis. In your case, these Network unreachable / network timeouts could
be noticed in the logs, for you to pay attention to. i.e. having a smart
log analysis tool detecting trends.
________________
Peter Dietz
Longsight
www.longsight.com
pe...@longsight.com
p: 740-599-5005 x809
On Tue, Mar 31, 2015 at 5:28 AM, Sean Carte <sean.ca...@gmail.com> wrote:
> Downloads from two of my DSpace 5.1 repositories are extremely slow. Not
> the download itself, but the period between clicking on a link and the
> download starting.
>
> I'm seeing this in the logs on both servers, which looks like it might be
> related:
>
> 2015-03-31 11:03:14,332 INFO org.apache.http.impl.execchain.RetryExec @
> I/O exception (java.net.SocketException) caught when processing request to
> {s}->https://www.google-analytics.com:443: Network is unreachable
> 2015-03-31 11:03:14,332 INFO org.apache.http.impl.execchain.RetryExec @
> Retrying request to {s}->https://www.google-analytics.com:443
>
> Our international bandwidth is congested, so that could account for the
> problem, but what has me confused is that only one of the servers is using
> Google analytics. The other has the Google analytics lines in dspace.cfg
> commented out (XMLUI and JSPUI), yet it shows the same problem.
>
> Have I overlooked a configuration somewhere for the server not using
> Google analytics, and is this likely to be the cause of the problem?
>
> DSpace 5.1
> Tomcat 7
> PostgreSQL 9.3.6
> OpenJDK 7
> Ubuntu 14.04
>
> Sean
> --
>
>
>
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by Intel and developed in partnership with Slashdot Media, is your hub for all
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news, videos, case studies, tutorials and more. Take a look and join the
conversation now. http://goparallel.sourceforge.net/
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