toddlipcon commented on a change in pull request #595: HDFS-14304: High lock
contention on hdfsHashMutex in libhdfs
URL: https://github.com/apache/hadoop/pull/595#discussion_r267053799
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File path:
hadoop-hdfs-project/hadoop-hdfs-native-client/src/main/native/libhdfs/jni_helper.c
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@@ -534,6 +545,21 @@ JNIEnv* getJNIEnv(void)
state->env = getGlobalJNIEnv();
mutexUnlock(&jvmMutex);
+
+ if (!jclassesInitialized) {
+ mutexLock(&jclassInitMutex);
Review comment:
I don't see a corresponding unlock for this
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