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https://issues.apache.org/jira/browse/CAMEL-25883?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen updated CAMEL-25883:
--------------------------------
Fix Version/s: 4.24.0
> camel-jgroups-raft - with the raftHandle option of the component, an endpoint
> whose producer stops, or whose route is removed, disconnects or closes the
> RaftHandle under the other endpoints
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-25883
> URL: https://issues.apache.org/jira/browse/CAMEL-25883
> Project: Camel
> Issue Type: Bug
> Components: camel-jgroups
> Reporter: shashank
> Assignee: shashank
> Priority: Major
> Fix For: 4.24.0
>
>
> The {{raftHandle}} option of the JGroups Raft component (a {{RaftHandle}}
> with its {{JChannel}}, Raft log and state machine) is given to every endpoint
> the component creates ({{JGroupsRaftComponent.createEndpoint}}). Each
> {{JGroupsRaftEndpoint}} (main 20cdb309f7d0) counts only its own producers and
> consumers in {{connectCount}}, and closes the channel and the Raft log when
> it stops:
> {code:java}
> public void disconnect() {
> if (connectCount.decrementAndGet() == 0) {
> resolvedRaftHandle.channel().disconnect();
> }
> }
> protected void doStop() throws Exception {
> if (resolvedRaftHandle != null && resolvedRaftHandle.channel() != null) {
> resolvedRaftHandle.channel().close();
> }
> if (resolvedRaftHandle != null && resolvedRaftHandle.log() != null) {
> resolvedRaftHandle.log().close();
> }
> ...
> {code}
> With the component {{raftHandle}}, two endpoints of the same cluster that
> differ in their options (for example a producer to {{jgroups-raft:orders}}
> and a consumer from {{jgroups-raft:orders?enableRoleChangeEvents=true}})
> share the handle but not the count. When the producer route stops, its
> endpoint disconnects the shared channel, so the node leaves the Raft cluster
> while the consumer route stays started. When the producer route is removed,
> its endpoint is stopped and closes the channel and the Raft log of the shared
> handle, and the other endpoints cannot use the handle again. Nothing is
> logged at WARN or ERROR.
> This is the same pattern as CAMEL-25852 (camel-jgroups, the {{channel}}
> option of the component); it was left out of that fix to keep it to one
> component.
> *Fix*: as in CAMEL-25852, the component counts the producers and consumers of
> a handle that the endpoints did not create (the component {{raftHandle}}, or
> a handle given to one endpoint with {{raftHandle=#bean}}) and disconnects its
> channel when the last of them stops; an endpoint closes only a handle it
> created itself (from {{channelProperties}} or the default), and the component
> closes the other handles when it stops. A handle an endpoint creates itself
> is unchanged. A producer or consumer disconnects the handle only when it
> connected it (a consumer whose route never started is stopped as well), and
> the component closes each handle in its own try, so a failure to close one
> does not leave the others open.
> *How it was found*: variant analysis of CAMEL-25852 during the review of its
> pull request, reading {{JGroupsRaftEndpoint}} and {{JGroupsRaftComponent}},
> then a JUnit test ({{JGroupsRaftComponentHandleEndpointsTest}}: component
> {{raftHandle}} on a single member cluster, a producer route to
> {{jgroups-raft:<cluster>}} and a consumer route from
> {{jgroups-raft:<cluster>?enableRoleChangeEvents=true}}). On main, after
> stopping the producer route the shared channel is no longer connected ({{the
> consumer route still uses the handle ==> expected: <true> but was:
> <false>}}), and after removing the producer route it is closed ({{the
> consumer route still uses the handle ==> expected: <false> but was:
> <true>}}). In review, {{JGroupsRaftNeverStartedConsumerTest}} (a consumer
> route with {{autoStartup(false)}} next to a producer route on the component
> handle) showed that stopping the never started route disconnected the handle
> ({{after stopRoute of the never started route ==> expected: <true> but was:
> <false>}}); fixed with a connected flag in the producer and the consumer.
> camel-jgroups-raft unit tests with the fix: 19 run, 0 failures.
> *Affected*: main, camel-4.23.x, camel-4.22.x, camel-4.18.x and camel-4.14.x
> (the same per-endpoint {{connectCount}} and {{close}} in {{doStop}}; read,
> not run).
> _Filed with Claude Code on behalf of allthingssecurity._
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