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  1. JBoss Enterprise Application Platform 4 and 5
  2. JBPAPP-7463 Upgrade JGroups to 2.6.22
  3. JBPAPP-9167

TCPPING: add new member addresses to initial_hosts dynamically

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    • Documentation (Ref Guide, User Guide, etc.), Release Notes
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      The TCPPING configuration in JGroups had to define statically the list of all possible cluster members. Consequently, the cluster had to be restarted if a new member was added. The "max_dynamic_hosts" property has been added to TCPPING which defines the number of extra hosts to be added dynamically to the cluster without the need to restart the cluster. Therefore, it is now possible to add new members to the cluster when using TCPPING without requiring the cluster restart. The property default value is "0". Note that the new nodes need to be added statically to each node's configuration at the next restart of that node.
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      The TCPPING configuration in JGroups had to define statically the list of all possible cluster members. Consequently, the cluster had to be restarted if a new member was added. The "max_dynamic_hosts" property has been added to TCPPING which defines the number of extra hosts to be added dynamically to the cluster without the need to restart the cluster. Therefore, it is now possible to add new members to the cluster when using TCPPING without requiring the cluster restart. The property default value is "0". Note that the new nodes need to be added statically to each node's configuration at the next restart of that node.
    • Documented as Feature Request
    • NEW

    Description

      When we have A,B and C listed in initial_hosts but later D and E join, and we have a partition

      {A,B,C}

      and

      {D,E}

      , when the partition heals later, we have no way of merging the 2 subgroups back into 1 because initial_hosts doesn't contain D or E.
      SOLUTION: dynamically add members not in initial_hosts to initial_hosts on view changes. Keep the number of dynamically added members bounded.

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          Sub-task - The sub-task of the issue JBPAPP-10010 TCPPING: add new member addresses to initial_hosts dynamically

          • 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.
          • Closed
          is blocked by

          Feature Request - Feature requests from customers and/or users JGRP-989 TCPPING: add new member addresses to initial_hosts dynamically

          • 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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              rhn-support-dereed Dennis Reed
              rhn-support-dereed Dennis Reed
              Eva Kopalova Eva Kopalova (Inactive)
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                Updated:
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