This jira is similar to MAPREDUCE-6626, we can see detail info about this problem.
Reuse objectMapper instance in HDFS to improve the performance
Reuse ObjectMapper instance in MapReduce
Attach a initial patch, kindly review.
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Fix checkstyle errors.
Thanks for the patch, Yiqun Lin! Apologies in the delay for review.
Patch looks good to me, but it no longer applies. Could you please rebase it?
Patch LGTM, but it no longer applies to the current trunk. I'll try to tweak it so that it applies.
I'd like to +1 for the patch. If there are other concerns please feel free to let me know. Will put this patch in soon.
I quickly updated Yiqun Lin's original patch to make it apply to trunk. Kicking off Jenkins to see if there're more things need to take care of.
Looks clean. Will wait for a few hours and then commit it.
Will commit the patch shortly.
Committed to trunk and branch-2. Thanks Yiqun Lin for the contribution and Jason Lowe for the review!
SUCCESS: Integrated in Jenkins build Hadoop-trunk-Commit #10711 (See https://builds.apache.org/job/Hadoop-trunk-Commit/10711/)
YARN-4668. Reuse objectMapper instance in Yarn. (Yiqun Lin via (gtcarrera9: rev 221582c4ab0ff1d5936f754f23da140aac656654)