InterruptedExceptions should never be ignored in the code, and simply logging the exception counts in this case as "ignoring". Instead, InterruptedExceptions should either be rethrown - immediately or after cleaning up the method's state - or the method should be reinterrupted. Any other course of action risks delaying thread shutdown and loses the information that the thread was interrupted - probably without finishing its task.

Noncompliant Code Example

public void run () {
  try {
    while (true) {
      // do stuff
    }
  }catch (InterruptedException e) { // Noncompliant; logging is not enough
    LOGGER.log(Level.WARN, "Interrupted!", e);
  }
}

Compliant Solution

public void run () {
  try {
    while (true) {
      // do stuff
    }
  }catch (InterruptedException e) {
    LOGGER.log(Level.WARN, "Interrupted!", e);
    // clean up state...
    Thread.currentThread().interrupt();
  }
}

See

• MITRE, CWE-391 - Unchecked Error Condition