java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.

GitHub | damithc | 11 months ago
  1. 0

    GAE error during join action: too much contention on these datastore entities. please try again

    GitHub | 11 months ago | damithc
    java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.
  2. 0

    GitHub comment 4651#174964661

    GitHub | 10 months ago | damithc
    java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.
  3. 0

    Cannot upgrade

    Google Groups | 5 years ago | Ryan Taylor
    java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.
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  5. 0

    Critical Errors in Sync

    Google Groups | 5 years ago | Eamon
    java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.
  6. 0

    List access synchronization in GAE

    Stack Overflow | 4 years ago | Michele Orsi
    java.util.ConcurrentModificationException: too much contention on these datastore entities. please try again.

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    Root Cause Analysis

    1. java.util.ConcurrentModificationException

      too much contention on these datastore entities. please try again.

      at com.google.appengine.api.datastore.DatastoreApiHelper.translateError()
    2. Google AppEngine
      DatastoreServiceImpl.put
      1. com.google.appengine.api.datastore.DatastoreApiHelper.translateError(DatastoreApiHelper.java:60)
      2. com.google.appengine.api.datastore.DatastoreApiHelper$1.convertException(DatastoreApiHelper.java:137)
      3. com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:108)
      4. com.google.appengine.api.datastore.Batcher$ReorderingMultiFuture.get(Batcher.java:132)
      5. com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:92)
      6. com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:92)
      7. com.google.appengine.api.utils.FutureWrapper.get(FutureWrapper.java:92)
      8. com.google.appengine.api.datastore.FutureHelper.getInternal(FutureHelper.java:77)
      9. com.google.appengine.api.datastore.FutureHelper.quietGet(FutureHelper.java:37)
      10. com.google.appengine.api.datastore.DatastoreServiceImpl.put(DatastoreServiceImpl.java:58)
      10 frames
    3. appengine-managed-runtime
      DatastoreSessionStore.saveSession
      1. com.google.apphosting.runtime.DatastoreSessionStore.saveSession(DatastoreSessionStore.java:112)
      1 frame
    4. com.google.apphosting
      SessionManager.newSession
      1. com.google.apphosting.runtime.jetty.SessionManager.createSession(SessionManager.java:363)
      2. com.google.apphosting.runtime.jetty.SessionManager$AppEngineSession.<init>(SessionManager.java:124)
      3. com.google.apphosting.runtime.jetty.SessionManager.newSession(SessionManager.java:282)
      4. com.google.apphosting.runtime.jetty.SessionManager.newSession(SessionManager.java:38)
      4 frames
    5. Jetty Server
      Request.getSession
      1. org.mortbay.jetty.servlet.AbstractSessionManager.newHttpSession(AbstractSessionManager.java:413)
      2. org.mortbay.jetty.Request.getSession(Request.java:1242)
      3. org.mortbay.jetty.Request.getSession(Request.java:1214)
      3 frames
    6. teammates.ui.controller
      ControllerServlet.doGet
      1. teammates.ui.controller.Action.initialiseAttributes(Action.java:91)
      2. teammates.ui.controller.Action.init(Action.java:81)
      3. teammates.ui.controller.ActionFactory.getAction(ActionFactory.java:144)
      4. teammates.ui.controller.ControllerServlet.doPost(ControllerServlet.java:57)
      5. teammates.ui.controller.ControllerServlet.doGet(ControllerServlet.java:38)
      5 frames
    7. JavaServlet
      HttpServlet.service
      1. javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
      2. javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
      2 frames
    8. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:511)
      2. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1166)
      2 frames
    9. teammates.storage.datastore
      DatastoreFilter.doFilter
      1. teammates.storage.datastore.DatastoreFilter.doFilter(DatastoreFilter.java:28)
      1 frame
    10. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      1 frame
    11. Google AppEngine
      AppstatsFilter.doFilter
      1. com.google.appengine.tools.appstats.AppstatsFilter.doFilter(AppstatsFilter.java:143)
      1 frame
    12. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      1 frame
    13. Google AppEngine
      ParseBlobUploadFilter.doFilter
      1. com.google.apphosting.utils.servlet.ParseBlobUploadFilter.doFilter(ParseBlobUploadFilter.java:125)
      1 frame
    14. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      1 frame
    15. com.google.apphosting
      SaveSessionFilter.doFilter
      1. com.google.apphosting.runtime.jetty.SaveSessionFilter.doFilter(SaveSessionFilter.java:37)
      1 frame
    16. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      1 frame
    17. Google AppEngine
      JdbcMySqlConnectionCleanupFilter.doFilter
      1. com.google.apphosting.utils.servlet.JdbcMySqlConnectionCleanupFilter.doFilter(JdbcMySqlConnectionCleanupFilter.java:60)
      1 frame
    18. Jetty Server
      ServletHandler$CachedChain.doFilter
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      1 frame
    19. Google AppEngine
      TransactionCleanupFilter.doFilter
      1. com.google.apphosting.utils.servlet.TransactionCleanupFilter.doFilter(TransactionCleanupFilter.java:43)
      1 frame
    20. Jetty Server
      WebAppContext.handle
      1. org.mortbay.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1157)
      2. org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:388)
      3. org.mortbay.jetty.security.SecurityHandler.handle(SecurityHandler.java:216)
      4. org.mortbay.jetty.servlet.SessionHandler.handle(SessionHandler.java:182)
      5. org.mortbay.jetty.handler.ContextHandler.handle(ContextHandler.java:765)
      6. org.mortbay.jetty.webapp.WebAppContext.handle(WebAppContext.java:418)
      6 frames
    21. com.google.apphosting
      AppVersionHandlerMap.handle
      1. com.google.apphosting.runtime.jetty.AppVersionHandlerMap.handle(AppVersionHandlerMap.java:260)
      1 frame
    22. Jetty Server
      HttpConnection$RequestHandler.headerComplete
      1. org.mortbay.jetty.handler.HandlerWrapper.handle(HandlerWrapper.java:152)
      2. org.mortbay.jetty.Server.handle(Server.java:326)
      3. org.mortbay.jetty.HttpConnection.handleRequest(HttpConnection.java:542)
      4. org.mortbay.jetty.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:923)
      4 frames
    23. com.google.apphosting
      RpcRequestParser.parseAvailable
      1. com.google.apphosting.runtime.jetty.RpcRequestParser.parseAvailable(RpcRequestParser.java:78)
      1 frame
    24. Jetty Server
      HttpConnection.handle
      1. org.mortbay.jetty.HttpConnection.handle(HttpConnection.java:404)
      1 frame
    25. com.google.apphosting
      JettyServletEngineAdapter.serviceRequest
      1. com.google.apphosting.runtime.jetty.JettyServletEngineAdapter.serviceRequest(JettyServletEngineAdapter.java:148)
      1 frame
    26. appengine-managed-runtime
      JavaRuntime$RequestRunnable.run
      1. com.google.apphosting.runtime.JavaRuntime$RequestRunnable.run(JavaRuntime.java:469)
      1 frame
    27. Google tracing
      TraceContext$TraceContextRunnable.run
      1. com.google.tracing.TraceContext$TraceContextRunnable.runInContext(TraceContext.java:437)
      2. com.google.tracing.TraceContext$TraceContextRunnable$1.run(TraceContext.java:444)
      3. com.google.tracing.CurrentContext.runInContext(CurrentContext.java:256)
      4. com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContextNoUnref(TraceContext.java:308)
      5. com.google.tracing.TraceContext$AbstractTraceContextCallback.runInInheritedContext(TraceContext.java:300)
      6. com.google.tracing.TraceContext$TraceContextRunnable.run(TraceContext.java:441)
      6 frames
    28. appengine-managed-runtime
      ThreadGroupPool$PoolEntry.run
      1. com.google.apphosting.runtime.ThreadGroupPool$PoolEntry.run(ThreadGroupPool.java:235)
      1 frame
    29. Java RT
      Thread.run
      1. java.lang.Thread.run(Thread.java:745)
      1 frame