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https://issues.apache.org/jira/browse/SOLR-17160?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17822738#comment-17822738
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David Smiley commented on SOLR-17160:
-------------------------------------
Even at the top level (ZK), the async IDs are capped at 10K before getting
purged -- SizeLimitedDistributedMap with
org.apache.solr.cloud.Overseer#NUM_RESPONSES_TO_STORE (10K).
100 is clearly way too low.
> Bulk admin operations may fail because of max tracked requests
> --------------------------------------------------------------
>
> Key: SOLR-17160
> URL: https://issues.apache.org/jira/browse/SOLR-17160
> Project: Solr
> Issue Type: Bug
> Security Level: Public(Default Security Level. Issues are Public)
> Components: Backup/Restore
> Affects Versions: 8.11, 9.5
> Reporter: Pierre Salagnac
> Priority: Minor
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> In {{{}CoreAdminHandler{}}}, we maintain in-memory the list of in-flight
> requests and completed/failed request.
> _Note they are core/replica level async requests, and not top level requests
> which mostly at the collection level. Top level requests are tracked by
> storing the async ID in a Zookeeper node, which is not related to this
> ticket._
>
> For completed/failed requests, we only track a maximum of 100 requests by
> dropping the oldest ones. The typical client in
> {{CollectionHandlingUtils.waitForCoreAdminAsyncCallToComplete()}} polls
> status of the submitted requests, with a retry loop until requests are
> completed. If for some reason we have more than 100 requests that complete or
> fail on a node before all statuses are polled by the client, the statuses are
> lost and the client will fail with an unexpected error similar to:
> {{Invalid status request for requestId: '{_}<id>{_}' - 'notfound'. Retried
> _<n>_ times}}
>
> Instead of having a hard limit for the number of requests we track, we could
> have time based eviction. I think it makes sense to keep status of a request
> until a given timeout, and then drop it ignoring how many requests we
> currently track.
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