Recently, we've started getting unusual SOLR errors on our DSpace 5.10
XMLUI installation.
It's reporting a Socket read failed. I did some googling and either my
google-fu failed me... or there isn't much on this front at all.
Has anyone encountered this or have suggestions as to how to resolve this?
In the DSpace log, this reports as the dreaded "Expected mime type
application/octet-stream but got text/html" error such as:
org.dspace.discovery.SearchServiceException: Expected mime type
application/octet-stream but got text/html. <!DOCTYPE HTML PUBLIC
"-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at
root@localhost to inform them of the time this error occurred,
and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>
at
org.dspace.discovery.SolrServiceImpl.search(SolrServiceImpl.java:1618)
at
org.dspace.discovery.SolrServiceImpl.search(SolrServiceImpl.java:1600)
at
org.dspace.discovery.SolrServiceImpl.search(SolrServiceImpl.java:1583)
at
org.dspace.app.xmlui.aspect.discovery.SidebarFacetsTransformer.getQueryArgs(SidebarFacetsTransformer.java:388)
at
org.dspace.app.xmlui.aspect.discovery.SidebarFacetsTransformer.performSearch(SidebarFacetsTransformer.java:156)
at
org.dspace.app.xmlui.aspect.discovery.SidebarFacetsTransformer.getValidity(SidebarFacetsTransformer.java:119)
The full SOLR error log is as follows.
2021-01-05 05:48:38,821 ERROR org.apache.solr.core.SolrCore @
org.apache.solr.common.SolrException: Socket read failed
at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:176)
at
org.apache.solr.handler.UpdateRequestHandler$1.load(UpdateRequestHandler.java:99)
at
org.apache.solr.handler.ContentStreamHandlerBase.handleRequestBody(ContentStreamHandlerBase.java:74)
at
org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:135)
at org.apache.solr.core.SolrCore.execute(SolrCore.java:1967)
at
org.apache.solr.servlet.SolrDispatchFilter.execute(SolrDispatchFilter.java:777)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:418)
at
org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:207)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.dspace.solr.filters.LocalHostRestrictionFilter.doFilter(LocalHostRestrictionFilter.java:50)
at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)
at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1152)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:622)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: com.ctc.wstx.exc.WstxIOException: Socket read failed
at
com.ctc.wstx.stax.WstxInputFactory.doCreateSR(WstxInputFactory.java:548)
at
com.ctc.wstx.stax.WstxInputFactory.createSR(WstxInputFactory.java:604)
at
com.ctc.wstx.stax.WstxInputFactory.createSR(WstxInputFactory.java:629)
at
com.ctc.wstx.stax.WstxInputFactory.createXMLStreamReader(WstxInputFactory.java:324)
at org.apache.solr.handler.loader.XMLLoader.load(XMLLoader.java:172)
... 27 more
Caused by: java.io.IOException: Socket read failed
at org.apache.coyote.ajp.AjpProcessor.read(AjpProcessor.java:316)
at org.apache.coyote.ajp.AjpProcessor.readMessage(AjpProcessor.java:367)
at org.apache.coyote.ajp.AjpProcessor.receive(AjpProcessor.java:334)
at
org.apache.coyote.ajp.AbstractAjpProcessor.refillReadBuffer(AbstractAjpProcessor.java:735)
at
org.apache.coyote.ajp.AbstractAjpProcessor$SocketInputBuffer.doRead(AbstractAjpProcessor.java:1220)
at org.apache.coyote.Request.doRead(Request.java:438)
at
org.apache.catalina.connector.InputBuffer.realReadBytes(InputBuffer.java:290)
at org.apache.tomcat.util.buf.ByteChunk.substract(ByteChunk.java:449)
at org.apache.catalina.connector.InputBuffer.read(InputBuffer.java:315)
at
org.apache.catalina.connector.CoyoteInputStream.read(CoyoteInputStream.java:167)
at com.ctc.wstx.io.UTF8Reader.loadMore(UTF8Reader.java:365)
at com.ctc.wstx.io.UTF8Reader.read(UTF8Reader.java:110)
at
com.ctc.wstx.io.ReaderBootstrapper.initialLoad(ReaderBootstrapper.java:245)
at
com.ctc.wstx.io.ReaderBootstrapper.bootstrapInput(ReaderBootstrapper.java:132)
at
com.ctc.wstx.stax.WstxInputFactory.doCreateSR(WstxInputFactory.java:543)
... 31 more
2021-01-05 05:48:38,822 INFO org.apache.solr.core.SolrCore @ [statistics]
webapp=/solr path=/update params={wt=javabin&version=2} status=400 QTime=2
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