[HADOOP-16300] ebugs automated bug checker is reporting exception issues

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1.2
• Assignee: Unassigned
• Reporter: Haicheng Chen
• Created: 07/May/19 09:21
• Updated: 12/May/19 08:33

Description

"ebugs-in-cloud-systems" is reporting issues related to exception handling

Some of them may be be correct, some of them appear to have misunderstood issues.

For reference

• we aren't going to change the signature of public APIs, so new exception classes will not be added. anything which suggests that will be WONTFIX.
• we probably aren't going to change code which throws unchecked exceptions to checked ones unless there is a good reason.
• we can and do tighten the exceptions thrown in failures (e.g. replace an IOException with an InterruptedIOException. Patches welcome there, with tests.
• making sure we don't lose the stack traces of inner causes would be nice too.

Issue Links

• relates to: HDFS-14486 The exception classes in some throw statements do not accurately describe why they are thrown

Sub-Tasks

• MiniKdc() throws a RuntimeException when it fails to create its workDir: Open
• FileUtil.replaceFile() throws an IOException when it is interrupted, which leads to an unnecessary disk check: Open
• MiniKdc.main() throws a RuntimeException when the work directory does not exist: Open