JDK-7027157 : Project Coin: javac warnings for AutoCloseable.close throwing InterruptedException
  • Type: Enhancement
  • Component: tools
  • Sub-Component: javac
  • Affected Version: 7
  • Priority: P3
  • Status: Closed
  • Resolution: Fixed
  • OS: generic
  • CPU: generic
  • Submitted: 2011-03-14
  • Updated: 2016-04-29
  • Resolved: 2011-05-17
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JDK 7
7 b138Fixed
Related Reports
Relates :  
JDK-8155591 - Misleading warning when not overriding close method in interface extending AutoCloseable
Relates :  
JDK-7148025 - javac should not warn about InterruptedException on the declaration of AutoCloseable itself
Relates :  
JDK-7027362 - Project Coin: warn of throwing InterruptedException in AutoCloseable.close javadoc
Description
The JSR 334 expert group has decided that it is probably a programming error is an AutoCloseable.close method throws InterruptedException since InterruptedException interacts with a thread's interrupted status.  A suppressed InterruptedException is likely to lead to misbehavior at runtime.

To catch such conceptual mistakes, it would be helpful is javac warned about structures like "public void close throws InterruptedException {...}"
Comments
SUGGESTED FIX A webrev of this fix is available at the following URL: http://hg.openjdk.java.net/jdk7/tl/langtools/rev/de1c65ecfec2
29-03-2011
EVALUATION We need Xlint:try warnings at both declaration site and use site. *) Declaration-site: class MyRes implements AutoCloseable { void close throws InterruptedException { ... } //warning here - close method throwing IE } *) Use-site try (MyRes mr = new MyRes()) { ... } //warning here - using a TWR resource whose close() throws IE
21-03-2011