Github user aledsage commented on a diff in the pull request:
https://github.com/apache/incubator-brooklyn/pull/617#discussion_r30590479
--- Diff: utils/common/src/main/java/brooklyn/util/javalang/Threads.java ---
@@ -44,7 +46,15 @@ public static boolean removeShutdownHook(Thread hook) {
return Runtime.getRuntime().removeShutdownHook(hook);
} catch (IllegalStateException e) {
// probably shutdown in progress
- log.debug("cannot remove shutdown hook "+hook+": "+e);
+ String text = Exceptions.collapseText(e);
+ if (text.contains("Shutdown in progress")) {
+ if (log.isTraceEnabled()) {
+ log.trace("Could not remove shutdown hook "+hook+":
"+text);
--- End diff --
Add trace and debug level, we should just include the entire stacktrace
rather than truncating. Otherwise we risk losing important information for
debugging problems that customers send via log files.
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