[HADOOP-15239] S3ABlockOutputStream.flush() be no-op when stream closed

• Type: Sub-task
• Status: Resolved
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 2.9.0, 2.8.3, 2.7.5, 3.0.0
• Fix Version/s: 3.2.0
• Component/s: fs/s3
• Assignee: Gabor Bota
• Reporter: Steve Loughran
• Created: 15/Feb/18 13:24
• Updated: 30/Apr/18 23:26
• Resolved: 30/Apr/18 23:05

Description

when you call flush() on a closed S3A output stream, you get a stack trace.

This can cause problems in code with race conditions across threads, e.g. FLINK-8543.

we could make it log@warn "stream closed" rather than raise an IOE. It's just a hint, after all.

Issue Links

• relates to: FLINK-8543 Output Stream closed at org.apache.hadoop.fs.s3a.S3AOutputStream.checkOpen