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https://issues.apache.org/jira/browse/SLING-1290?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12802233#action_12802233
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Ian Boston commented on SLING-1290:
-----------------------------------
Since multithreaded reading can happen during startup we need to setFast(true)
on the FastTreeMap as soon as its created, rather than after its initialized.
This will incur an overhead in GC activity but make the operation multithreaded.
Need to check the code to see what is done at the moment.
doc on FastTreeMap is at
http://commons.apache.org/collections/api-2.1.1/org/apache/commons/collections/FastTreeMap.html
> Concurrent modification exception on startup
> --------------------------------------------
>
> Key: SLING-1290
> URL: https://issues.apache.org/jira/browse/SLING-1290
> Project: Sling
> Issue Type: Bug
> Components: JCR
> Affects Versions: JCR Resource 2.0.6
> Reporter: Carsten Ziegeler
>
> java.util.ConcurrentModificationException
> at
> org.apache.commons.collections.FastTreeMap$CollectionView$CollectionViewIterator.hasNext(FastTreeMap.java:745)
> at
> org.apache.sling.jcr.resource.internal.helper.ResourceProviderEntry.getResourceProviders(ResourceProviderEntry.java:547)
> at
> org.apache.sling.jcr.resource.internal.helper.ResourceProviderEntry.getResourceProviders(ResourceProviderEntry.java:529)
> at
> org.apache.sling.jcr.resource.internal.helper.ResourceProviderEntry.access$000(ResourceProviderEntry.java:50)
> at
> org.apache.sling.jcr.resource.internal.helper.ResourceProviderEntry$1.<init>(ResourceProviderEntry.java:167)
> at
> org.apache.sling.jcr.resource.internal.helper.ResourceProviderEntry.listChildren(ResourceProviderEntry.java:142)
> at
> org.apache.sling.jcr.resource.internal.JcrResourceResolver.listChildren(JcrResourceResolver.java:458)
> at
> org.apache.sling.servlets.resolver.internal.helper.ResourceCollector.getWeightedResources(ResourceCollector.java:193)
> at
> org.apache.sling.servlets.resolver.internal.helper.ResourceCollector.getServlets(ResourceCollector.java:173)
> at
> org.apache.sling.servlets.resolver.internal.SlingServletResolver.getServlet(SlingServletResolver.java:457)
> at
> org.apache.sling.servlets.resolver.internal.SlingServletResolver.resolveServlet(SlingServletResolver.java:205)
> at
> org.apache.sling.engine.impl.request.RequestData.initServlet(RequestData.java:216)
> at
> org.apache.sling.engine.impl.SlingMainServlet.service(SlingMainServlet.java:298)
> at
> org.apache.sling.engine.impl.SlingMainServlet.service(SlingMainServlet.java:189)
> at
> org.eclipse.equinox.http.servlet.internal.ServletRegistration.handleRequest(ServletRegistration.java:90)
> at
> org.eclipse.equinox.http.servlet.internal.ProxyServlet.processAlias(ProxyServlet.java:109)
> at
> org.eclipse.equinox.http.servlet.internal.ProxyServlet.service(ProxyServlet.java:75)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
> at
> org.apache.sling.launchpad.base.webapp.SlingServletDelegate.service(SlingServletDelegate.java:276)
> at
> org.apache.sling.launchpad.webapp.SlingServlet.service(SlingServlet.java:129)
> at
> org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
> at
> org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
> at
> com.day.crx.launchpad.filters.CRXLaunchpadLicenseFilter.doFilter(CRXLaunchpadLicenseFilter.java:96)
> 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:233)
> at
> org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
> at
> org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
> at
> org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
> at
> org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
> at
> org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
> at
> org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)
> at
> org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
> at
> org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)
> at java.lang.Thread.run(Thread.java:637)
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