Don't start pollEsNodesVersion unless someone subscribes #56923
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streamich
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By not polling until subscribed to, we prevent verbose error logs when the optimizer is run (which automatically skips migrations).
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mshustov
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| this.log.error(message); | ||
| } | ||
| }); | ||
| }).pipe(shareReplay({ refCount: true, bufferSize: 1 })); |
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Do you use bufferSize: 1 to reduce memory footprint?
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The buffer size is the size of the replay subject that shareReplay uses internally. As long as there are subscribers, any new subscribers will get the last 1 values. So as long as we're polling, any new subscribers will immediately get the latest version check results.
When there are no subscribers, refCount drops to 0 and the internal replay subject will unsubscribe from pollEsNodesVersion$. When there's no subscriptions and then we get one new subscriber, that subscriber won't get any buffered/replayed version checks since these could be very old. Only once pollEsNodesVersion$ emits a value again will the first subscriber get a result.
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This was referenced Feb 28, 2020
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* Don't start pollEsNodesVersion unless someone subscribes By not polling until subscribed to, we prevent verbose error logs when the optimizer is run (which automatically skips migrations). * Test pollEsNodeVersions behaviour * Cleanup unused code * PR Feedback * Make test more stable Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
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Looks like this PR has backport PRs but they still haven't been merged. Please merge them ASAP to keep the branches relatively in sync. |
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Looks like this PR has backport PRs but they still haven't been merged. Please merge them ASAP to keep the branches relatively in sync. |
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…dex-server-side * 'master' of github.com:elastic/kibana: (34 commits) [Upgrade Assistant] Remove "boom" from reindex service (elastic#58715) [data] Clean up QueryStringInput unit tests (elastic#58704) [SIEM] Detection Fix typo in Adobe Hijack Persistence rule (elastic#58804) Restores [SIEM][CASE] Init Configure Case Page (elastic#58121) (elastic#58924) Skips additional failing Ingest Manager integration tests Skips failing Ingest Manager integration tests Move dev tools styles to NP (elastic#58855) change to have kibana --ssl cli option use more recent certs (elastic#57933) disable failing suite (elastic#58942) Don't start pollEsNodesVersion unless someone subscribes (elastic#56923) Do not write UUID file during optimize process (elastic#58899) [Endpoint] Task/add nav bar (elastic#58604) [Metric Alerts] Add backend support for multiple expressions per alert (elastic#58672) [Metrics Alerts] Fix alerting on a rate aggregation (elastic#58789) disable flaky suite (elastic#55953) Revert "[SIEM] apollo@3 (elastic#51926)" and "[SIEM][CASE] Init Confi… (elastic#58806) [resubmit] Prep agg types for new platform (elastic#58893) [Lens] Allow number formatting within Lens (elastic#56253) [Autocomplete] Use settings from config rather than UI settings (elastic#58784) Improve action and trigger types (elastic#58657) ... # Conflicts: # x-pack/plugins/upgrade_assistant/server/routes/reindex_indices/reindex_indices.ts
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…8947) * Don't start pollEsNodesVersion unless someone subscribes By not polling until subscribed to, we prevent verbose error logs when the optimizer is run (which automatically skips migrations). * Test pollEsNodeVersions behaviour * Cleanup unused code * PR Feedback * Make test more stable Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com> Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
rudolf
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…8946) * Don't start pollEsNodesVersion unless someone subscribes By not polling until subscribed to, we prevent verbose error logs when the optimizer is run (which automatically skips migrations). * Test pollEsNodeVersions behaviour * Cleanup unused code * PR Feedback * Make test more stable Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com> Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>
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By not polling until subscribed to, we prevent verbose error logs when
the optimizer is run (which automatically skips migrations).
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