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https://issues.apache.org/jira/browse/HIVE-21206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16764828#comment-16764828
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mahesh kumar behera commented on HIVE-21206:
--------------------------------------------
01.patch looks fine to me. +1
> Bootstrap replication is slow as it opens lot of metastore connections.
> -----------------------------------------------------------------------
>
> Key: HIVE-21206
> URL: https://issues.apache.org/jira/browse/HIVE-21206
> Project: Hive
> Issue Type: Bug
> Components: repl
> Affects Versions: 4.0.0
> Reporter: Sankar Hariappan
> Assignee: Sankar Hariappan
> Priority: Major
> Labels: DR, pull-request-available, replication
> Attachments: HIVE-21206.01.patch
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Hive bootstrap replication of 1TB data onprem to onprem in Hive3 is running
> slower compared to Hive2.
> Time taken for bootstrap replication of table with 1000 partitions are as
> below:
> || Hive2- Hive2 || Hive3 - Hive3 ||
> |Bootstrap: 7m| BootStrap: 17m |
> Every MoveTask is closing and opening new metastore connection which is
> causing slow down.
> {code}
> 2019-02-08T12:28:30,174 INFO [HiveServer2-Background-Pool: Thread-1134]:
> ql.Driver (:()) - Starting task [Stage-5:MOVE] in serial mode
> 2019-02-08T12:28:30,177 INFO [HiveServer2-Background-Pool: Thread-1134]:
> exec.Task (:()) - Loading data to table nondefault.nondefault_table1 from
> hdfs://mycluster1/warehouse/tablespace/managed/hive/nondefault.db/nondefault_table1/.hive-staging_hive_2019-02-08_12-28-23_584_1482331698286040936-3/-ext-10001
> 2019-02-08T12:28:30,189 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Trying to connect to metastore with URI
> thrift://ctr-e139-1542663976389-62755-01-000014.hwx.site:9083
> 2019-02-08T12:28:30,189 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - HMSC::open(): Could not find delegation
> token. Creating KERBEROS-based thrift connection.
> 2019-02-08T12:28:30,206 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Opened a connection to metastore,
> current connections: 4
> 2019-02-08T12:28:30,206 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Connected to metastore.
> 2019-02-08T12:28:30,206 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.RetryingMetaStoreClient (:()) - RetryingMetaStoreClient proxy=class
> org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
> ugi=hive/ctr-e139-1542663976389-62755-01-000014.hwx.s...@hwqe.hortonworks.com
> (auth:KERBEROS) retries=24 delay=5 lifetime=0
> 2019-02-08T12:28:30,325 INFO
> [org.apache.ranger.audit.queue.AuditBatchQueue1]: provider.BaseAuditHandler
> (:()) - Audit Status Log: name=hiveServer2.async.multi_dest.batch,
> finalDestination=hiveServer2.async.multi_dest.batch.solr, interval=01:00.002
> minutes, events=2, succcessCount=1, totalEvents=56, totalSuccessCount=25
> 2019-02-08T12:28:30,520 INFO [HiveServer2-Background-Pool: Thread-1134]:
> common.FileUtils (FileUtils.java:mkdir(580)) - Creating directory if it
> doesn't exist:
> hdfs://mycluster1/warehouse/tablespace/managed/hive/nondefault.db/nondefault_table1/base_0000001
> 2019-02-08T12:28:31,245 INFO [HiveServer2-Background-Pool: Thread-1134]:
> ql.Driver (:()) - Starting task [Stage-11:MOVE] in serial mode
> 2019-02-08T12:28:31,245 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Closed a connection to metastore,
> current connections: 3
> 2019-02-08T12:28:31,246 INFO [HiveServer2-Background-Pool: Thread-1134]:
> exec.Task (:()) - Loading data to table nondefault.nondefault_table2 from
> hdfs://mycluster1/warehouse/tablespace/managed/hive/nondefault.db/nondefault_table2/.hive-staging_hive_2019-02-08_12-28-23_810_7457138692783022870-3/-ext-10002
> 2019-02-08T12:28:31,327 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Trying to connect to metastore with URI
> thrift://ctr-e139-1542663976389-62755-01-000014.hwx.site:9083
> 2019-02-08T12:28:31,327 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - HMSC::open(): Could not find delegation
> token. Creating KERBEROS-based thrift connection.
> 2019-02-08T12:28:31,336 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Opened a connection to metastore,
> current connections: 4
> 2019-02-08T12:28:31,337 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.HiveMetaStoreClient (:()) - Connected to metastore.
> 2019-02-08T12:28:31,337 INFO [HiveServer2-Background-Pool: Thread-1134]:
> metastore.RetryingMetaStoreClient (:()) - RetryingMetaStoreClient proxy=class
> org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
> ugi=hive/ctr-e139-1542663976389-62755-01-000014.hwx.s...@hwqe.hortonworks.com
> (auth:KERBEROS) retries=24 delay=5 lifetime=0
> 2019-02-08T12:28:31,642 INFO [HiveServer2-Background-Pool: Thread-1134]:
> common.FileUtils (FileUtils.java:mkdir(580)) - Creating directory if it
> doesn't exist:
> hdfs://mycluster1/warehouse/tablespace/managed/hive/nondefault.db/nondefault_table2/base_0000001
> {code}
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