Solr index locked for all cores at startup

[Stefano Bocconi]

Hi,

I constantly get the Error creating core [x]: Index locked for write for core x for all Solr cores (search, statistics, oai, authority).

I have stopped tomcat, deleted the lock files and restarted but they reappear immediately. I have also temporarily excluded the oai core from the conf file, but the lock appears on the others.

I am using Dspace 5.6 with modifications mostly to the input-form.xml and registry files, but not to the code.

I attach the Solr log file. Pointers to where to look for appreciated.

Thanks,

  Stefano Bocconi

[helix84]

Just an idea - is it possible that you're loading the dspace-solr
webapp twice? E.g. a duplicate <Context> declaration or a duplicate
context fragment?


Regards,
~~helix84

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[Stefano Bocconi]

You are right, I have checked and I have everything twice,

This is related to the fact that I have used a different path than the root, but I have not defined context twice, this is my server.xml

 <Host name="localhost"  appBase="/home/dspace/dspace/webapps"

            unpackWARs="true" autoDeploy="true">

        <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
               prefix="localhost_access_log." suffix=".txt"
               pattern="%h %l %u %t &quot;%r&quot; %s %b" />

       <Context docBase="rest" path="/dspace/rest"></Context>
<!--<Context docBase="sword" path="dspace/sword"></Context>
<Context docBase="swordv2" path="dspace/swordv2"></Context>-->
<Context docBase="xmlui" path="/dspace/xmlui"></Context>
<Context docBase="jspui" path="/dspace/jspui"></Context>
<Context docBase="solr" path="/dspace/solr"></Context>
<!--<Context docBase="oai" path="dspace/oai"></Context>-->
</Host>

Apparently the context with /solr (i.d. without the dspace prefix) is defined somewhere else, but I need to find out where ….

Thanks a lot!

Stefano

[Mark H. Wood]

You have explicitly declared a Context for each of the webapp.s, and also have an appBase pointing at what appears to be the target of a DSpace installation, with autoDeploy='true'.  So you've told Tomcat to load individual webapp.s from various directories under /dspace and *also* to deploy any webapp.s found in the directory /home/dspace/dspace/webapps.  Probably you need one or the other.  I would remove or comment out the <Context> elements.  (The Tomcat maintainers discourage the use of <Context> in server.xml, although it does work.  If you need full control over a Context, you can define it in a separate file as described in the Tomcat documentation, but then don't place the webapp.s in the appBase directory.)

https://wiki.duraspace.org/display/DSDOC5x/Installing+DSpace#InstallingDSpace-Installation lays out two ways of deploying DSpace in Tomcat, which you may find helpful.

[Stefano Bocconi]

Hi Mark,

Thanks again for your explanation, at the end I removed the auto deploy from the appBase Host (and kept the Contexts)  as I need to control the path of the web apps and also which one are deployed.

Stefano

On 15 Jun 2017, at 15:25, Mark H. Wood <mwood...@gmail.com> wrote:

You have explicitly declared a Context for each of the webapp.s, and also have an appBase pointing at what appears to be the target of a DSpace installation, with autoDeploy='true'.  So you've told Tomcat to load individual webapp.s from various directories under /dspace and *also* to deploy any webapp.s found in the directory /home/dspace/dspace/webapps.  Probably you need one or the other.  I would remove or comment out the <Context> elements.  (The Tomcat maintainers discourage the use of <Context> in server.xml, although it does work.  If you need full control over a Context, you can define it in a separate file as described in the Tomcat documentation, but then don't place the webapp.s in the appBase directory.)

https://wiki.duraspace.org/display/DSDOC5x/Installing+DSpace#InstallingDSpace-Installation lays out two ways of deploying DSpace in Tomcat, which you may find helpful.

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