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  1. mod_cluster
  2. MODCLUSTER-639

proxy reset requests can allow for other MCMPs to bad proxy

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    Description

      There's a timing issue between proxy reset requests and other MCMPs. This can allow for some severe start up delays if there is a configured proxy that is down or unresponsive. Start up is seen to be stalled as it tries to send enable-apps to the bad proxy:

      "ServerService Thread Pool -- 72" #134 prio=5 os_prio=0 tid=0x00007f84581fa9f0 nid=0x6718 runnable [0x00007f83c1561000]
   java.lang.Thread.State: RUNNABLE
        at java.net.SocketInputStream.socketRead0(Native Method)
        at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
        at java.net.SocketInputStream.read(SocketInputStream.java:171)
        at java.net.SocketInputStream.read(SocketInputStream.java:141)
        at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
        at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
        at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
        - locked <0x00000000eb0a4700> (a java.io.InputStreamReader)
        at java.io.InputStreamReader.read(InputStreamReader.java:184)
        at java.io.BufferedReader.fill(BufferedReader.java:161)
        at java.io.BufferedReader.readLine(BufferedReader.java:324)
        - locked <0x00000000eb0a4700> (a java.io.InputStreamReader)
        at java.io.BufferedReader.readLine(BufferedReader.java:389)
        at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.sendRequest(DefaultMCMPHandler.java:529)
        at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.sendRequest(DefaultMCMPHandler.java:605)
        - locked <0x00000000fcaac598> (a org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler$Proxy)
        at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.sendRequest(DefaultMCMPHandler.java:429)
        at org.jboss.modcluster.ModClusterService.enable(ModClusterService.java:375)
        at org.jboss.modcluster.ModClusterService.start(ModClusterService.java:361)
        at org.wildfly.mod_cluster.undertow.UndertowEventHandlerAdapter.onDeploymentStart(UndertowEventHandlerAdapter.java:136)
        - locked <0x00000000fcaac7a8> (a org.wildfly.mod_cluster.undertow.UndertowEventHandlerAdapter)
        at org.wildfly.extension.undertow.Host$1.invoke(Host.java:192)
        at org.wildfly.extension.undertow.UndertowService.fireEvent(UndertowService.java:249)
        - locked <0x00000000fcaa4598> (a java.util.Collections$SynchronizedList)
        at org.wildfly.extension.undertow.Host.registerDeployment(Host.java:189)
        at org.wildfly.extension.undertow.deployment.UndertowDeploymentService.startContext(UndertowDeploymentService.java:103)
        at org.wildfly.extension.undertow.deployment.UndertowDeploymentService$1.run(UndertowDeploymentService.java:82)

      This can occur because a reset request places the proxy back in an OK state, which then allows the ENABLEs or any MCMP through.

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          Bug - A problem that impairs or prevents the functions of the product. JBEAP-14141 [GSS](7.1.z) MODCLUSTER-639 - proxy reset requests can allow for other MCMPs to bad proxy

          • 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.
          • Closed

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              rhn-engineering-rhusar Radoslav Husar
              rhn-support-aogburn Aaron Ogburn
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                Updated:
                Resolved: