[jira] [Created] (HIVE-10173) ThreadLocal synchronized initialvalue() is irrelevant in JDK7

["Gopal V (JIRA)" <ji...@apache.org>]

Gopal V created HIVE-10173:
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             Summary: ThreadLocal synchronized initialvalue() is irrelevant in JDK7
                 Key: HIVE-10173
                 URL: https://issues.apache.org/jira/browse/HIVE-10173
             Project: Hive
          Issue Type: Bug
          Components: Query Processor
    Affects Versions: 1.2.0
            Reporter: Gopal V
            Priority: Minor


The threadlocals need not synchronize the calls to initialvalue(), since that is effectively going to be called once per-thread in JDK7.

The anti-pattern lives on due to a very old JDK bug - https://bugs.openjdk.java.net/browse/JDK-6550283

{code}
$ git grep --name-only -c "protected.*synchronized.*initialValue"
common/src/java/org/apache/hadoop/hive/conf/LoopingByteArrayInputStream.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesInput.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesOutput.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesRecordInput.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesRecordOutput.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesWritableInput.java
contrib/src/java/org/apache/hadoop/hive/contrib/util/typedbytes/TypedBytesWritableOutput.java
metastore/src/java/org/apache/hadoop/hive/metastore/Deadline.java
metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java
ql/src/java/org/apache/hadoop/hive/ql/exec/TaskFactory.java
ql/src/java/org/apache/hadoop/hive/ql/exec/Utilities.java
ql/src/java/org/apache/hadoop/hive/ql/io/IOContext.java
ql/src/java/org/apache/hadoop/hive/ql/metadata/Hive.java
ql/src/java/org/apache/hadoop/hive/ql/session/OperationLog.java
serde/src/java/org/apache/hadoop/hive/serde2/io/TimestampWritable.java
serde/src/test/org/apache/hadoop/hive/serde2/io/TestTimestampWritable.java
service/src/java/org/apache/hive/service/auth/TSetIpAddressProcessor.java
service/src/java/org/apache/hive/service/cli/session/SessionManager.java
shims/common/src/main/java/org/apache/hadoop/hive/thrift/HadoopThriftAuthBridge.java
{code}



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