[CASSANDRA-13605] threads created during classload-static sections open commitlog handles

• Type: Bug
• Status: Open
• Priority: Low
• Resolution: Unresolved
• Fix Version/s: 3.0.x
• Component/s: Legacy/Core, Legacy/Tools
• Severity: Low
• Assignee: Unassigned
• Reporter: Nathan Jackels
• Created: 14/Jun/17 22:23
• Updated: 16/Apr/19 09:30

Description

Some classes, such as org.apache.cassandra.db.commitlog.CommitLog create threads in static blocks. Some of these threads then open file-descriptors for the commitlog (and possibly sstables).

...
public static final CommitLog instance = CommitLog.construct();
...
private static CommitLog construct()
{
    CommitLog log = new CommitLog(DatabaseDescriptor.getCommitLogLocation(), CommitLogArchiver.construct());
    ....
    return log.start();
}
...

If this occurs in a non-daemon process such as nodetool, or any of the other sstable tools it could prevent a CassandraDaemon from deleting commitlog files.

These threads should only open files automatically if the process is a CassandraDaemon, not if it's a utility.

Issue Links

• relates to: CASSANDRA-8616 sstable tools may result in commit log segments be written