https://jira.opendaylight.org This file is an XML representation of an issue en-us 8.20.10 820010 22-06-2022 https://jira.opendaylight.org/browse/CONTROLLER-1823 controller <p>There is a regression in OF cluster test: Stats collection freezes after disconnecting switch from owner or when reconnecting switch to additional members. This does not happen immediately but after a few retries.</p> <p>After some investigation, I was able to trace back the regression to this patch and all the cherry-picks:</p> <p><a href="https://git.opendaylight.org/gerrit/#/c/68900/" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/#/c/68900/</a></p> CONTROLLER-1823

Regression in OF cluster test

Bug High Resolved Done Robert Varga Luis Gomez Thu, 5 Apr 2018 17:00:35 +0000 Thu, 12 Apr 2018 18:31:48 +0000 Sat, 7 Apr 2018 00:58:15 +0000 Carbon Nitrogen Oxygen Fluorine clustering 0 3 <p>Attached are full traces with cluster debug. Problem in this case started when switch was only connected to member-1 and it initiates connection to extra member-2 and member-3 at 01:59:32, you can see the WARNs on member-1 few seconds after:</p> <div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent"> <pre class="code-java"> 2018-04-02 01:59:51,328 | WARN | ofppool-2 | TransactionContextWrapper | 215 - org.opendaylight.controller.sal-distributed-datastore - 1.6.3.SNAPSHOT | Failed to acquire enqueue operation permit <span class="code-keyword">for</span> transaction member-1-datastore-operational-fe-0-chn-6-txn-96-0 on shard inventory 2018-04-02 01:59:56,330 | WARN | ofppool-2 | RemoteTransactionContext | 215 - org.opendaylight.controller.sal-distributed-datastore - 1.6.3.SNAPSHOT | Failed to acquire execute operation permit <span class="code-keyword">for</span> transaction member-1-datastore-operational-fe-0-chn-6-txn-96-0 on actor ActorSelection[Anchor(akka.tcp:<span class="code-comment">//opendaylight-cluster-data@192.168.0.102:2550/), Path(/user/shardmanager-operational/member-2-shard-inventory-operational/shard-inventory-member-1:datastore-operational@0:6-96_797#643731958)]</span> </pre> </div></div> <p>The problem is the stateful semaphore handoff between TransactionContextWrapper and RemoteTransactionContext. RemoteTransactionContext needs to understand when an incoming operations has tried to acquire a permit and whether it was successful in doing so.</p> <p>With the <a href="https://jira.opendaylight.org/browse/CONTROLLER-1814" title="Datastore transactions fail to converge during partitioning" class="issue-link" data-issue-key="CONTROLLER-1814"><del>CONTROLLER-1814</del></a> change the backend-controlled feedback which provided a semi-recovery in this scenario went away, leading to OperationLimiter to be under-released, as the permits acquired by TransactionContextWrapper would never get released by RemoteTransactionContext.</p> <p>Nitrogen: <a href="https://git.opendaylight.org/gerrit/70382" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/70382</a></p> <p>Oxygen: <a href="https://git.opendaylight.org/gerrit/70384" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/70384</a></p> <p>Fluorine: <a href="https://git.opendaylight.org/gerrit/70439" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/70439</a></p> <p>Carbon: <a href="https://git.opendaylight.org/gerrit/70440" class="external-link" target="_blank" rel="nofollow noopener">https://git.opendaylight.org/gerrit/70440</a></p> <p> </p> Relates CONTROLLER-1825 Development Rank 0|i03ctj: