cpoerschke commented on a change in pull request #227:
URL: https://github.com/apache/solr/pull/227#discussion_r673293571
##########
File path: solr/solrj/src/java/org/apache/solr/common/util/ExecutorUtil.java
##########
@@ -148,6 +148,8 @@ public static ExecutorService
newMDCAwareCachedThreadPool(int maxThreads, Thread
threadFactory);
}
+ public final static ThreadLocal<Exception> submitter = new ThreadLocal<>();
Review comment:
```suggestion
final static ThreadLocal<Exception> submitter = new ThreadLocal<>();
```
##########
File path: solr/solrj/src/java/org/apache/solr/common/util/ExecutorUtil.java
##########
@@ -196,7 +198,13 @@ public void execute(final Runnable command) {
String ctxStr = contextString.toString().replace("/", "//");
final String submitterContextStr = ctxStr.length() <=
MAX_THREAD_NAME_LEN ? ctxStr : ctxStr.substring(0, MAX_THREAD_NAME_LEN);
- final Exception submitterStackTrace = enableSubmitterStackTrace ? new
Exception("Submitter stack trace") : null;
+ final Exception submitterStackTrace;
+ if (enableSubmitterStackTrace) {
+ Exception grandParentSubmitter = submitter.get();
+ submitterStackTrace = new Exception("Submitter stack trace",
grandParentSubmitter);
Review comment:
Could we have a comment (or rename) w.r.t. the `grandParent` bit here?
At a glance `parent` is intuitive with the `get/construct/set` pattern. On
second glance it seems the current method executes the `submitter.set` call in
a pool, making this method the "parent" relative to the pool execution and the
`submitter.get` result the "parent" relative to this method but the "grand
parent" relative to the method that will run in the pool. Is that it, more or
less?
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