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src-kafka/storage
Jotaniya Jeel
4612fe42af
RemoteIndexCache has a concurrency bug which leads to IOException while fetching data from remote tier. The bug could be reproduced as per the following order of events:- Thread 1 (cache thread): invalidates the entry, removalListener is invoked async, so the files have not been renamed to "deleted" suffix yet. Thread 2: (fetch thread): tries to find entry in cache, doesn't find it because it has been removed by 1, fetches the entry from S3, writes it to existing file (using replace existing) Thread 1: async removalListener is invoked, acquires a lock on old entry (which has been removed from cache), it renames the file to "deleted" and starts deleting it Thread 2: Tries to create in-memory/mmapped index, but doesn't find the file and hence, creates a new file of size 2GB in AbstractIndex constructor. JVM returns an error as it won't allow creation of 2GB random access file. This commit fixes the bug by using EvictionListener instead of RemovalListener to perform the eviction atomically with the file rename. It handles the manual removal (not handled by EvictionListener) by using computeIfAbsent() and enforcing atomic cache removal & file rename. Reviewers: Luke Chen <showuon@gmail.com>, Divij Vaidya <diviv@amazon.com>, Arpit Goyal <goyal.arpit.91@gmail.com>, Kamal Chandraprakash <kamal.chandraprakash@gmail.com> |
11 months ago | |
|---|---|---|
| .. | ||
| api/src | MINOR: Fix errors in javadoc and docs in tiered storage (#14379) | 1 year ago |
| src | KAFKA-15481: Fix concurrency bug in RemoteIndexCache (#14483) | 11 months ago |