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/
>
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