{"action":"created","comment":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/comments/35734051","id":35734051,"diff_hunk":"@@ -122,22 +128,24 @@ void put(String key, Value value, Scope scope) {\n     Preconditions.checkNotNull(value.toString(), String.format(\"Null value provided for the key '%s'.\", key));\n     Preconditions.checkState(nodeName != null, \"nodeName cannot be null.\");\n \n-    List<NodeValue> nodeValueList = tokenValueMap.get(scope).get(key);\n-    if (nodeValueList == null) {\n-      nodeValueList = Lists.newArrayList();\n-      tokenValueMap.get(scope).put(key, nodeValueList);\n-    }\n+    synchronized (sharedLock) {\n+      List<NodeValue> nodeValueList = tokenValueMap.get(scope).get(key);","path":"cdap-app-fabric/src/main/java/co/cask/cdap/internal/app/runtime/workflow/BasicWorkflowToken.java","position":129,"original_position":129,"commit_id":"5e5f70778c1123443900138456e4d714f1ef0227","original_commit_id":"5e5f70778c1123443900138456e4d714f1ef0227","user":{"login":"gsps1","id":1328150,"avatar_url":"https://avatars.githubusercontent.com/u/1328150?v=3","gravatar_id":"","url":"https://api.github.com/users/gsps1","html_url":"https://github.com/gsps1","followers_url":"https://api.github.com/users/gsps1/followers","following_url":"https://api.github.com/users/gsps1/following{/other_user}","gists_url":"https://api.github.com/users/gsps1/gists{/gist_id}","starred_url":"https://api.github.com/users/gsps1/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gsps1/subscriptions","organizations_url":"https://api.github.com/users/gsps1/orgs","repos_url":"https://api.github.com/users/gsps1/repos","events_url":"https://api.github.com/users/gsps1/events{/privacy}","received_events_url":"https://api.github.com/users/gsps1/received_events","type":"User","site_admin":false},"body":"generally we don't include types in variable names right? nodeValues would be a better name.","created_at":"2015-07-29T07:32:04Z","updated_at":"2015-07-29T07:32:04Z","html_url":"https://github.com/caskdata/cdap/pull/3311#discussion_r35734051","pull_request_url":"https://api.github.com/repos/caskdata/cdap/pulls/3311","_links":{"self":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/comments/35734051"},"html":{"href":"https://github.com/caskdata/cdap/pull/3311#discussion_r35734051"},"pull_request":{"href":"https://api.github.com/repos/caskdata/cdap/pulls/3311"}}},"pull_request":{"url":"https://api.github.com/repos/caskdata/cdap/pulls/3311","id":40934792,"html_url":"https://github.com/caskdata/cdap/pull/3311","diff_url":"https://github.com/caskdata/cdap/pull/3311.diff","patch_url":"https://github.com/caskdata/cdap/pull/3311.patch","issue_url":"https://api.github.com/repos/caskdata/cdap/issues/3311","number":3311,"state":"open","locked":false,"title":"Added parentNodIds to the WorkflowNode.","user":{"login":"sagarkapare","id":5713570,"avatar_url":"https://avatars.githubusercontent.com/u/5713570?v=3","gravatar_id":"","url":"https://api.github.com/users/sagarkapare","html_url":"https://github.com/sagarkapare","followers_url":"https://api.github.com/users/sagarkapare/followers","following_url":"https://api.github.com/users/sagarkapare/following{/other_user}","gists_url":"https://api.github.com/users/sagarkapare/gists{/gist_id}","starred_url":"https://api.github.com/users/sagarkapare/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sagarkapare/subscriptions","organizations_url":"https://api.github.com/users/sagarkapare/orgs","repos_url":"https://api.github.com/users/sagarkapare/repos","events_url":"https://api.github.com/users/sagarkapare/events{/privacy}","received_events_url":"https://api.github.com/users/sagarkapare/received_events","type":"User","site_admin":false},"body":"Opening it against release/3.1 branch.\r\n\r\nJIRA: https://issues.cask.co/browse/CDAP-3000\r\n\r\nFollowing changes are done as a part of the PR:\r\n1. 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