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https://reviews.apache.org/r/32937/
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Review request for kafka.


Bugs: KAFKA-2102
    https://issues.apache.org/jira/browse/KAFKA-2102


Repository: kafka


Description
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Method does not need to be synchronized


Do not synchronize contains topic method


Continue removing the need to synchronize the metadata object


Store both last refresh and need to refresh in same variable


Fix synchronize issue


Version needs to be volatile


rework how signally happens


remove unnecessary creation of new set


initialize 0 at the field level


Diffs
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  clients/src/main/java/org/apache/kafka/clients/Metadata.java 
07f1cdb1fe920b0c7a5f2d101ddc40c689e1b247 
  clients/src/main/java/org/apache/kafka/clients/producer/KafkaProducer.java 
b91e2c52ed0acb1faa85915097d97bafa28c413a 

Diff: https://reviews.apache.org/r/32937/diff/


Testing
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Thanks,

Tim Brooks

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