alirezazamani commented on issue #741: Fix ConcurrentModification exception in Workflow Garbage Collection URL: https://github.com/apache/helix/pull/741#issuecomment-585041520 This PR is ready to be merged, approved by @narendly. Final commit message: Title: Fix ConcurrentModification exception in Workflow Garbage Collection Body: In workflow Garbage collection, there is possibility that we encounter ConcurrentMod exception while looping through the workflow contexts. This commit fixes this issue by looping through a deep copy of the contexts list.
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