rishisankar commented on a change in pull request #1770:
URL: https://github.com/apache/lucene-solr/pull/1770#discussion_r476924185
##########
File path:
solr/core/src/java/org/apache/solr/handler/component/HttpShardHandler.java
##########
@@ -156,36 +155,31 @@ public void submit(final ShardRequest sreq, final String
shard, final Modifiable
return;
}
- // all variables that set inside this listener must be at least volatile
- responseCancellableMap.put(srsp, this.lbClient.asyncReq(lbReq, new
AsyncListener<>() {
- volatile long startTime = System.nanoTime();
-
- @Override
- public void onStart() {
- if (tracer != null && span != null) {
- tracer.inject(span.context(), Format.Builtin.HTTP_HEADERS, new
SolrRequestCarrier(req));
- }
- SolrRequestInfo requestInfo = SolrRequestInfo.getRequestInfo();
- if (requestInfo != null)
req.setUserPrincipal(requestInfo.getReq().getUserPrincipal());
- }
+ long startTime = System.nanoTime();
+ if (tracer != null && span != null) {
Review comment:
I think they're the same thread? In the previous implementation, the
same thread that calls `submit()` [calls the async request
method](https://github.com/apache/lucene-solr/blob/master/solr/core/src/java/org/apache/solr/handler/component/HttpShardHandler.java#L160)
and then within the async request method [calls
`onStart()`](https://github.com/apache/lucene-solr/blob/master/solr/solrj/src/java/org/apache/solr/client/solrj/impl/LBHttp2SolrClient.java#L89)
- so it seems to me like previously the thread that called `submit()` and
`onStart()` are the same.
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