Github user dineshjoshi commented on a diff in the pull request:
https://github.com/apache/cassandra/pull/239#discussion_r204955043
--- Diff: src/java/org/apache/cassandra/db/lifecycle/LogFile.java ---
@@ -66,7 +66,7 @@
private final LogReplicaSet replicas = new LogReplicaSet();
// The transaction records, this set must be ORDER PRESERVING
- private final LinkedHashSet<LogRecord> records = new LinkedHashSet<>();
+ private final Set<LogRecord> records = Collections.synchronizedSet(new
LinkedHashSet<>()); // TODO: Hack until we fix CASSANDRA-14554
--- End diff --
I should've worded the comment differently but it is a hack to avoid a
`ConcurrentModificationException`
([CASSANDRA-14554](https://issues.apache.org/jira/browse/CASSANDRA-14554)).
This currently exists in trunk and was not introduced as part of this PR hence
the separate ticket.
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