[GitHub] [beam] boyuanzz commented on a change in pull request #13533: [BEAM-11474] Track transform processing thread in Java SDK harness and set log entry field

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boyuanzz commented on a change in pull request #13533:
URL: https://github.com/apache/beam/pull/13533#discussion_r543623610



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File path: sdks/java/harness/src/main/java/org/apache/beam/fn/harness/TransformProcessingThreadTracker.java
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@@ -0,0 +1,46 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.beam.fn.harness;
+
+import java.util.concurrent.ConcurrentHashMap;
+
+/**
+ * TransformProcessingThreadTracker tracks the thread ids for the transforms that are being
+ * processed in the SDK harness.
+ */
+public class TransformProcessingThreadTracker {

Review comment:
       Sorry that I'm not familiar with how logging service works, I'm wondering whether this will have multi-threading concurrency issue. 




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