David Bosschaert created SLING-3734:
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Summary: 'org.apache.sling.api.SlingException: Failed to generate
name' when posting under load
Key: SLING-3734
URL: https://issues.apache.org/jira/browse/SLING-3734
Project: Sling
Issue Type: Bug
Affects Versions: Launchpad Builder 7
Reporter: David Bosschaert
I was doing some load testing on the current Sling (trunk) launchpad which I
started as follows:
java -jar org.apache.sling.launchpad-7-SNAPSHOT-standalone.jar
I used a multitreaded client (JMeter, 4 threads) to send a whole bunch of post
requests to http://machine:8080/content/mynoderoot/ to get the node name
auto-generated.
However, on about 25% of the requests I'm getting a 500 response with the
following exception message: org.apache.sling.api.SlingException: Failed to
generate name. The full stack trace is below.
{code}org.apache.sling.api.SlingException: Failed to generate name
org.apache.sling.servlets.post.impl.operations.ModifyOperation.getItemPath(ModifyOperation.java:175)
org.apache.sling.servlets.post.AbstractPostOperation.run(AbstractPostOperation.java:77)
org.apache.sling.servlets.post.impl.SlingPostServlet.doPost(SlingPostServlet.java:199)
org.apache.sling.api.servlets.SlingAllMethodsServlet.mayService(SlingAllMethodsServlet.java:148)
org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:344)
org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:375)
org.apache.sling.engine.impl.request.RequestData.service(RequestData.java:511)
org.apache.sling.engine.impl.SlingRequestProcessorImpl.processComponent(SlingRequestProcessorImpl.java:289)
org.apache.sling.engine.impl.filter.RequestSlingFilterChain.render(RequestSlingFilterChain.java:49)
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:64)
org.apache.sling.engine.impl.debug.RequestProgressTrackerLogFilter.doFilter(RequestProgressTrackerLogFilter.java:64)
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:60)
org.apache.sling.engine.impl.SlingRequestProcessorImpl.doProcessRequest(SlingRequestProcessorImpl.java:153)
org.apache.sling.engine.impl.SlingMainServlet.service(SlingMainServlet.java:206)
org.apache.felix.http.base.internal.handler.ServletHandler.doHandle(ServletHandler.java:96)
org.apache.felix.http.base.internal.handler.ServletHandler.handle(ServletHandler.java:79)
org.apache.felix.http.base.internal.dispatch.ServletPipeline.handle(ServletPipeline.java:42)
org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:49)
org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:33)
org.apache.sling.engine.impl.log.RequestLoggerFilter.doFilter(RequestLoggerFilter.java:75)
org.apache.felix.http.base.internal.handler.FilterHandler.doHandle(FilterHandler.java:88)
org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:76)
org.apache.felix.http.base.internal.dispatch.InvocationFilterChain.doFilter(InvocationFilterChain.java:47)
org.apache.felix.http.base.internal.dispatch.HttpFilterChain.doFilter(HttpFilterChain.java:33)
org.apache.felix.http.base.internal.dispatch.FilterPipeline.dispatch(FilterPipeline.java:48)
org.apache.felix.http.base.internal.dispatch.Dispatcher.dispatch(Dispatcher.java:39)
org.apache.felix.http.base.internal.DispatcherServlet.service(DispatcherServlet.java:67)
javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:654)
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:445)
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:225)
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1044)
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:372)
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:189)
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:978)
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:255)
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
org.eclipse.jetty.server.Server.handle(Server.java:369)
org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:486)
org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:944)
org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1005)
org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:82)
org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.java:668)
org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java:52)
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
java.lang.Thread.run(Thread.java:744)
Caused by: javax.jcr.RepositoryException: Collision in generated node names for
path=/content/mynoderoot/some_title
org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.ensureUniquePath(AbstractCreateOperation.java:690)
org.apache.sling.servlets.post.impl.operations.AbstractCreateOperation.generateName(AbstractCreateOperation.java:664)
org.apache.sling.servlets.post.impl.operations.ModifyOperation.getItemPath(ModifyOperation.java:173)
... 49 common frames omitted{code}
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