Re: solr health check

Tue, 07 Jul 2009 08:26:39 -0700 

solr jay wrote:

Hi,

I am looking at this piece of configuration in solrconfig.xml

<admin>
    <defaultQuery>solr</defaultQuery>
    <gettableFiles>
         solrconfig.xml
         schema.xml
    </gettableFiles>
    <pingQuery>q=solr&amp;version=2.0&amp;start=0&amp;rows=0</pingQuery>

    <!-- configure a healthcheck file for servers behind a loadbalancer
      -->
    <healthcheck type="file">server-enabled</healthcheck>
  </admin>


I've never used this feature before, but reading source code...


It wasn't clear to me what 'server-enabled' means here. Is it a file name?

Yes, it is file name.


If it is file name, where the file should be?
The file name should be absolute path or relative path from solr work directory (if you start solr from example directory, make "server-enabled" file in example 
directory).


I added <healthcheck type="file">server-enabled</healthcheck>and admin/ping
stopped working, which is good, but I couldn't make it work again, and admin
UI generate an exception. Anyone used this feature before?


I don't understand why you are getting the follwoing error...
You should get "HTTP ERROR: 503 Service disabled" instead...

Koji


Thanks,

J


HTTP ERROR: 500

PWC6033: Unable to compile class for JSP

PWC6197: An error occurred at line: 28 in the jsp file: /admin/action.jsp
PWC6199: Generated servlet error:
Type mismatch: cannot convert from Logger to Logger

PWC6197: An error occurred at line: 28 in the jsp file: /admin/action.jsp
PWC6199: Generated servlet error:
The method log(Level, String) is undefined for the type Logger



org.apache.jasper.JasperException: PWC6033: Unable to compile class for JSP

PWC6197: An error occurred at line: 28 in the jsp file: /admin/action.jsp
PWC6199: Generated servlet error:
Type mismatch: cannot convert from Logger to Logger

PWC6197: An error occurred at line: 28 in the jsp file: /admin/action.jsp
PWC6199: Generated servlet error:
The method log(Level, String) is undefined for the type Logger


    at
org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:94)
    at
org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:267)
    at org.apache.jasper.compiler.Compiler.generateClass(Compiler.java:332)
    at org.apache.jasper.compiler.Compiler.compile(Compiler.java:389)
    at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:579)
    at
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:344)
    at
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:464)
    at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:358)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
    at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:487)
    at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:367)
    at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:268)
    at org.mortbay.jetty.servlet.Dispatcher.forward(Dispatcher.java:126)
    at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:273)
    at
org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1089)
    at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:365)
    at
org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
    at
org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:181)
    at
org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:712)
    at org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:405)
    at
org.mortbay.jetty.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:211)
    at
org.mortbay.jetty.handler.HandlerCollection.handle(HandlerCollection.java:114)
    at
org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:139)
    at org.mortbay.jetty.Server.handle(Server.java:295)
    at
org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:503)
    at
org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:827)
    at org.mortbay.jetty.HttpParser.parseNext(HttpParser.java:511)
    at org.mortbay.jetty.HttpParser.parseAvailable(HttpParser.java:210)
    at org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:379)
    at
org.mortbay.jetty.bio.SocketConnector$Connection.run(SocketConnector.java:226)
    at
org.mortbay.thread.BoundedThreadPool$PoolThread.run(BoundedThreadPool.java:442)
RequestURI=/solr/admin/action.jsp

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