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http://jira.dspace.org/jira/browse/DS-605?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=11505#action_11505
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Sands Fish commented on DS-605:
-------------------------------
We are seeing this at MIT on our 1.6.0 staging system. It has been intermittent
and typically occurs in the morning after the machine (which has very little
traffic on it) has been idle for the most part. We are seeing hits from our
local Google appliance, but I wouldn't jump to that as a cause, and even if it
is, that is still broken behavior.
To detail the little I've been able to learn when it happens to occur...
- A Tomcat (6) restart clears the condition.
- Traffic is still being passed (in our setup) from Apache to Tomcat. I had
suspected that perhaps jk_mod was dying, but the HTTP traffic is absolutely
getting to Tomcat.
- The response from the server is a HTTP/200 OK, with 0 bytes.
- The Content-Type header is "text/plain; charset=UTF-8"
(vs. "text/html;charset=utf-8" (lower-case, in case that's a hint) when
the instance is working).
- The response is immediate: 42ms.
- The only thing occurring in the logs when in this state is
SessionRequestServiceImpl creating new sessions. This is the closest thing I
have to a suspect right now, but not really a smoking gun.
Examples:
2010-06-09 11:41:13,595 INFO
org.dspace.services.sessions.SessionRequestServiceImpl @ Created new session:
Session:active:71399686A62E844F319F2011E58CAF2E:user=null(null):sid=71399686A62E844F319F2011E58CAF2E:server=dspace-prime:created=1276098073595:accessed=1276098073595:maxInactiveSecs=3600:hostIP=18.7.7.102:hostName=18.7.7.102:org.dspace.services.sessions.model.sessioni...@426cdc7b
2010-06-09 11:41:14,180 INFO
org.dspace.services.sessions.SessionRequestServiceImpl @ Created new session:
Session:active:1BB6707A43E2D85573F9AEE01ABC101A:user=null(null):sid=1BB6707A43E2D85573F9AEE01ABC101A:server=dspace-prime:created=1276098074180:accessed=1276098074180:maxInactiveSecs=3600:hostIP=66.249.71.236:hostName=66.249.71.236:org.dspace.services.sessions.model.sessioni...@179c6635
- and expiring still seems to be occurring:
2010-06-09 11:42:06,610 INFO
org.dspace.services.sessions.SessionRequestServiceImpl @ Expired 21 user
sessions, 203 sessions remain active
Another report from [dspace-tech]:
I've had the same problem... well still do... But someone told me that the
google crawlers are causing the problem... He was right. After blocking all the
crawlers the problems stopped... but so as the indexing my site by google. So
i've had to create a less restrictive robots.txt. Here is the configuration:
# Uncomment the following line ONLY if sitemaps.org or HTML sitemaps are used
# and you have verified that your site is being indexed correctly.
User-agent: Googlebot
Disallow: /browse
Disallow: /bitstream
Disallow: /browse
Disallow: /browse-date
#Disallow: /community-list
#Disallow: /handle
Disallow: /html
Disallow: /htmlmap
Disallow: /browse-*
Disallow: /items-by-author*
Disallow: /advanced-search
Disallow: /contact
Disallow: /feedback
Disallow: /forgot
Disallow: /login
Disallow: /register
Disallow: /search
User-agent: *
Disallow: /
So I'm blocking all the crawlers except google (with some exceptions).
Well... this does not do the trick.
My site is still crashing.
So an alternative answer would be needed, a core tweaking one!
Any help is highly appreciated
--
I'm having a similar issue,
It happens sporadically. The interface of Dspce XMLUI shows a blank screen and
I need to reboot Tomcat.
JSPUI The interface is not affected by the issue.
I'm using version 1.6.0 of DSpace. I use a theme based on the theme
"Reference" which comes in DSpace.
The version of tomcat is "apache-tomcat-6.0.18" and the JDK is "jdk1.6.0_13" on
Debian GNU Linux 5.0.
I heve opend the issue DS-605 on http://jira.dspace.org/.
Would anyone have
any ideas?
Regards
Antero Neto
> Blank screen on XMLUI Dspace 1.6.0
> ----------------------------------
>
> Key: DS-605
> URL: http://jira.dspace.org/jira/browse/DS-605
> Project: DSpace 1.x
> Issue Type: Bug
> Components: XMLUI
> Affects Versions: 1.6.0
> Environment: apache-tomcat-6.0.18
> jdk1.6.0_13
> Debian GNU Linux 5.0
> Reporter: Antero Neto
> Priority: Critical
>
> The interface of Dspce XMLUI shows a blank screen and I need to reboot Tomcat.
> JSPUI The interface is not affected by the issue. It happens sporadically.
> I'm using version 1.6.0 of DSpace. I use a theme based on the theme
> "Reference" which comes in DSpace.
> Below, some log information that may be related.
> 2010-06-09 00:07:00,741 ERROR cocoon.handled - Could not read resource
> cocoon://DRI/2/handle/xxxx/xxx/workflow
> at <map:serialize type="xml"> -
> resource://aspects/Statistics/sitemap.xmap:70:31
> at <map:transform type="Navigation"> -
> resource://aspects/Statistics/sitemap.xmap:38:55
> at <map:generate> - resource://aspects/Statistics/sitemap.xmap:33:19
> ...
> org.apache.cocoon.ProcessingException: Could not read resource
> cocoon://DRI/2/handle/xxxx/xxx/workflow
> at <map:serialize type="xml"> -
> resource://aspects/Statistics/sitemap.xmap:70:31
> at <map:transform type="Navigation"> -
> resource://aspects/Statistics/sitemap.xmap:38:55
> at <map:generate> - resource://aspects/Statistics/sitemap.xmap:33:19
> ...
> Caused by: java.lang.NullPointerException
> at
> org.apache.cocoon.components.source.impl.SitemapSource.init(SitemapSource.java:292)
> at
> org.apache.cocoon.components.source.impl.SitemapSource.<init>(SitemapSource.java:148)
> at
> org.apache.cocoon.components.source.impl.SitemapSourceFactory.getSource(SitemapSourceFactory.java:62)
> at
> org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:153)
> at
> org.apache.cocoon.components.source.CocoonSourceResolver.resolveURI(CocoonSourceResolver.java:183)
> at
> org.apache.cocoon.generation.FileGenerator.setup(FileGenerator.java:99)
> at
> org.dspace.app.xmlui.cocoon.AspectGenerator.setup(AspectGenerator.java:112)
> at sun.reflect.GeneratedMethodAccessor57.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
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