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  1. Undertow
  2. UNDERTOW-1215

modcluster internalPingNode does not use the connections from the nodes pool

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Details

    • Enhancement
    • Resolution: Unresolved
    • Major
    • None
    • 1.4.20.Final
    • Proxy
    • None

    Description

      internalPingNode (NodePingUtil.java) is used to periodically test the connection to a node using HttpClientPingTask. Comment states that it should probably use the connections from the nodes pool, if there are any available.

      Currently it uses HttpClientPingTask to do the actual work, but that does not use the connections from the nodes pool. It connects, sends the request and closes the connection.
      In a RHEL7.4 environment with more than 4000 JBoss EAP 6.4 instance backends, this results in a lot of TCP connections in state TIME_WAIT and a unnecessary large conntrack table.

      Can ConnectionPoolPingTask be used instead? Perhaps even remove HttpClientPingTask altogether.

      Workaround: increase the healthCheckInterval (ModCluster.java) to Integer.MAX_VALUE, effectively disabling the health check.

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          is related to

          Enhancement - An enhancement to or refactoring of existing functionality that is not configurable by an end user (typically a change made by an internal team that affects users) UNDERTOW-1200 AjpClientConnection should handle a closed connection like HttpClientConnection

          • Minor - To be worked after urgent, high, and medium priorities are resolved. This term is chosen when the severity of the issue is low, or the complexity or effort to correct it may be higher, relatively speaking. For low priority issues, known workarounds exist or are not needed due to the trivial effort needed to address the issue.
          • Resolved
          relates to

          Feature Request - Feature requests from customers and/or users UNDERTOW-1201 Add ping support to the AJP client

          • 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.
          • Resolved

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              Unassigned Unassigned
              frapex Frank de Jong (Inactive)
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                Created:
                Updated: