Github user ishark commented on a diff in the pull request:
https://github.com/apache/incubator-apex-core/pull/158#discussion_r44220893
--- Diff: engine/src/main/java/com/datatorrent/stram/webapp/TypeGraph.java
---
@@ -602,6 +558,14 @@ public void setJarName(String jarName)
public CompactClassNode getClassNode()
{
+ if (classNode == null) {
--- End diff --
Do we need double-checked locking here? Very slim chance, but is it likely
that describeOperator gets called simultaneously through dtcli?
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