Hi Mark and all,
DNS resolution is working, but with a couple of IP's we got a timeout.
In org.dspace.statistics.util.DnsLookup the timeout for the extended
resolver is set to 20 milliseconds see res.setTimeout(0, 20);
The default in our env would be 5 seconds. So I wonder whether to set
the timeout higher or to default.
Enjoy the OR and Madrid
Claudia
Am 24.06.2010 12:27, schrieb Mark Diggory:
> You need to make sure your DNS resolution is working properly on that
> machine so that the java library can use it. If configured
> correctly, the resolution errors may be malicious clients spoofing
> IP/hostnames.
>
> The Solr Statistics system needs to perform DNS lookups on client
> addresses to hosts during the analysis for detecting bots. If we want
> to make this feature optional, it will reduce the accuracy of
> excluding bot activity from the stats based on host domain.
>
> Mark
>
> On Jun 24, 2010, at 4:14 AM, Claudia Jürgen wrote:
>
>> Hi all,
>>
>> we updated our instance to 1.6.0 and got some (250-800/day) solr
>> errors (see below) related to the dns lookup in
>> org.dspace.statistics.SolrLogger at line 182: try { String dns =
>> DnsLookup.reverseDns(ip); doc1.addField("dns", dns.toLowerCase());
>> } catch (Exception e) { log.error(e.getMessage()); }
>>
>> Is anyone facing the same issue and maybe got solved it. Note in
>> the logs only the line ERROR org.dspace.statistics.SolrLogger @
>> appears.
>>
>> thanks
>>
>> Claudia Jürgen
>>
>>
>>
>> 2010-06-23 11:52:03,890 ERROR org.dspace.statistics.SolrLogger @
>> java.net.SocketTimeoutException at
>> org.xbill.DNS.Client.blockUntil(Client.java:43) at
>> org.xbill.DNS.UDPClient.recv(UDPClient.java:43) at
>> org.xbill.DNS.UDPClient.sendrecv(UDPClient.java:70) at
>> org.xbill.DNS.SimpleResolver.send(SimpleResolver.java:256) at
>> org.xbill.DNS.ExtendedResolver$Resolution.start(ExtendedResolver.java:93)
>>
>>
at org.xbill.DNS.ExtendedResolver.send(ExtendedResolver.java:359)
>> at
>> org.dspace.statistics.util.DnsLookup.reverseDns(DnsLookup.java:36)
>> at org.dspace.statistics.SolrLogger.post(SolrLogger.java:184) at
>> org.dspace.statistics.SolrLoggerUsageEventListener.receiveEvent(SolrLoggerUsageEventListener.java:41)
>>
>>
at
>> org.dspace.services.events.SystemEventService.fireLocalEvent(SystemEventService.java:154)
>>
>>
at
>> org.dspace.services.events.SystemEventService.fireEvent(SystemEventService.java:97)
>>
>>
at
>> org.dspace.app.webui.servlet.HandleServlet.doDSGet(HandleServlet.java:173)
>>
>>
at
>> org.dspace.app.webui.servlet.DSpaceServlet.processRequest(DSpaceServlet.java:151)
>>
>>
at
>> org.dspace.app.webui.servlet.DSpaceServlet.doGet(DSpaceServlet.java:99)
>>
>>
at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:803) at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
>>
>>
at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>
>>
at
>> org.dspace.utils.servlet.DSpaceWebappServletFilter.doFilter(DSpaceWebappServletFilter.java:112)
>>
>>
at
>> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
>>
>>
at
>> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
>>
>>
at
>> org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:230)
>>
>>
at
>> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
>>
>>
at
>> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
>>
>>
at
>> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:104)
>>
>>
at
>> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
>>
>>
at
>> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:261)
>>
>>
at
>> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
>>
>>
at
>> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:581)
>>
>>
at
>> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
>>
>>
at java.lang.Thread.run(Thread.java:595)
>>
>>
>>
>> -- Mit freundlichen Gruessen
>>
>> Claudia Juergen Universitaetsbibliothek Dortmund Eldorado
>> 0231/755-4043 https://eldorado.tu-dortmund.de/
>>
>> ------------------------------------------------------------------------------
>>
>>
ThinkGeek and WIRED's GeekDad team up for the Ultimate
>> GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky
>> parental unit. See the prize list and enter to win:
>> http://p.sf.net/sfu/thinkgeek-promo
>> _______________________________________________ DSpace-tech mailing
>> list DSpace-tech@lists.sourceforge.net
>> https://lists.sourceforge.net/lists/listinfo/dspace-tech
>
--
Mit freundlichen Gruessen
Claudia Juergen
Universitaetsbibliothek Dortmund
Eldorado
0231/755-4043
https://eldorado.tu-dortmund.de/
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