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  1. JBoss Enterprise Application Platform
  2. JBEAP-19450

[GSS](7.2.z) Undertow request failure happens due to "IllegalArgumentException: Comparison method violates its general contract!" when many filter-ref are defined

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Details

    • Bug
    • Resolution: Done
    • Major
    • 7.2.9.CR1, 7.2.9.GA
    • 7.2.7.GA
    • Undertow
    • None
    • +
    • Hide

      If you really need to define many filter-ref definition, you can work around this issue by adding the following to JAVA_OPTS in standalone.conf:

      JAVA_OPTS="$JAVA_OPTS -Djava.util.Arrays.useLegacyMergeSort=true"
      Show
      If you really need to define many filter-ref definition, you can work around this issue by adding the following to JAVA_OPTS in standalone.conf: JAVA_OPTS= "$JAVA_OPTS -Djava.util.Arrays.useLegacyMergeSort= true "
    • Hide

      0. Copy standalone.xml to standalone-test.xml for testing purpose

      cd /path/to/your/JBOSS_HOME/stadandalone/configuration/
cp standalone.xml standalone-test.xml

      1. Execute the attached "generate-cli.sh" to generate JBoss CLI script (test.cli) which configures many filter-ref definistion.
      2. Execute the generated "test.cli"

      ./bin/jboss-cli.sh --file=/path/to/test.cli

      3. Start JBoss EAP 7 with the configuration

      ./bin/standalone.sh -c standalone-test.xml

      4. Send a request

      curl -v http://localhost:8080/

      The request fails with "500 Internal Server Error" because of "IllegalArgumentException: Comparison method violates its general contract!"

      Show
      0. Copy standalone.xml to standalone-test.xml for testing purpose cd /path/to/your/JBOSS_HOME/stadandalone/configuration/ cp standalone.xml standalone-test.xml 1. Execute the attached "generate-cli.sh" to generate JBoss CLI script (test.cli) which configures many filter-ref definistion. 2. Execute the generated "test.cli" ./bin/jboss-cli.sh --file=/path/to/test.cli 3. Start JBoss EAP 7 with the configuration ./bin/standalone.sh -c standalone-test.xml 4. Send a request curl -v http: //localhost:8080/ The request fails with "500 Internal Server Error" because of "IllegalArgumentException: Comparison method violates its general contract!"

    Description

      When many filter-ref are defined (theoretically more than 32 filter-ref are defined), Undertow has a possibility fail to process a request with the following ERROR:

      ERROR [io.undertow.request] (default I/O-12) UT005071: Undertow request failed HttpServerExchange{ GET /}: java.lang.IllegalArgumentException: Comparison method violates its general contract!
	at java.util.TimSort.mergeLo(TimSort.java:777)
	at java.util.TimSort.mergeAt(TimSort.java:514)
	at java.util.TimSort.mergeCollapse(TimSort.java:441)
	at java.util.TimSort.sort(TimSort.java:245)
	at java.util.Arrays.sort(Arrays.java:1512)
	at java.util.ArrayList.sort(ArrayList.java:1462)
	at org.wildfly.extension.undertow.LocationService.configureHandlerChain(LocationService.java:93)
	at org.wildfly.extension.undertow.Host.configureRootHandler(Host.java:174)
	at org.wildfly.extension.undertow.Host.getOrCreateRootHandler(Host.java:263)
	at org.wildfly.extension.undertow.Host$HostRootHandler.handleRequest(Host.java:430)
	at io.undertow.server.handlers.NameVirtualHostHandler.handleRequest(NameVirtualHostHandler.java:54)
	at io.undertow.server.handlers.error.SimpleErrorPageHandler.handleRequest(SimpleErrorPageHandler.java:78)
	at io.undertow.server.handlers.CanonicalPathHandler.handleRequest(CanonicalPathHandler.java:49)
	at org.wildfly.extension.undertow.Server$DefaultHostHandler.handleRequest(Server.java:190)
	at io.undertow.server.handlers.ChannelUpgradeHandler.handleRequest(ChannelUpgradeHandler.java:211)
	at io.undertow.server.protocol.http2.Http2UpgradeHandler.handleRequest(Http2UpgradeHandler.java:102)
	at io.undertow.server.handlers.DisallowedMethodsHandler.handleRequest(DisallowedMethodsHandler.java:61)
	at io.undertow.server.Connectors.executeRootHandler(Connectors.java:370)
	at io.undertow.server.protocol.http.HttpReadListener.handleEventWithNoRunningRequest(HttpReadListener.java:255)
	at io.undertow.server.protocol.http.HttpReadListener.handleEvent(HttpReadListener.java:136)
	at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:162)
	at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:100)
	at io.undertow.server.protocol.http.HttpOpenListener.handleEvent(HttpOpenListener.java:57)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:291)
	at org.xnio.ChannelListeners$10.handleEvent(ChannelListeners.java:286)
	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
	at org.xnio.nio.QueuedNioTcpServer2.acceptTask(QueuedNioTcpServer2.java:178)
	at org.xnio.nio.WorkerThread.safeRun(WorkerThread.java:612)
	at org.xnio.nio.WorkerThread.run(WorkerThread.java:479)

      The IllegalArgumentException happens when Java's TimSort algorithm happens to detect inconsistency in the comparison. This happens because the comparator implementation for sorting filter-ref does not follow the contract for comparison.

      Attachments

        1. generate-cli.sh
          0.6 kB
        2. test.cli
          60 kB

        Issue Links

          clones

          Bug - A problem that impairs or prevents the functions of the product. JBEAP-19449 [GSS](7.3.z) WFLY-13447 - Undertow request failure happens due to "IllegalArgumentException: Comparison method violates its general contract!" when many filter-ref are defined

          • Major - To be worked after higher priority work items are addressed. When the severity is high and the effort to change it is low to moderate, this term is chosen. Issues in this category likely have an existing workaround but implementation or execution may be non-trivial.
          • Verified
          links to

          Web Link KCS#5063861

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            People

              chaowan@redhat.com Chao Wang
              rhn-support-mmiura Masafumi Miura
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              Dates

                Created:
                Updated:
                Resolved: