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https://issues.apache.org/jira/browse/HIVE-20888?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16679284#comment-16679284
]
Gopal V commented on HIVE-20888:
--------------------------------
The current workaround is
{code}
if (txnIds.size() > 1) {
Collections.sort(txnIds); //easier to read logs and for assumption done
in replication flow
}
{code}
which works fine for Singleton lists.
> TxnHandler: sort() called on immutable lists
> --------------------------------------------
>
> Key: HIVE-20888
> URL: https://issues.apache.org/jira/browse/HIVE-20888
> Project: Hive
> Issue Type: Bug
> Reporter: Gopal V
> Priority: Major
>
> {code}
> } else {
> assert (!rqst.isSetSrcTxnToWriteIdList());
> assert (rqst.isSetTxnIds());
> txnIds = rqst.getTxnIds();
> }
> Collections.sort(txnIds); //easier to read logs and for assumption
> done in replication flow
> {code}
> when the input comes from
> {code}
> @Override
> public long allocateTableWriteId(long txnId, String dbName, String
> tableName) throws TException {
> return allocateTableWriteIdsBatch(Collections.singletonList(txnId),
> dbName, tableName).get(0).getWriteId();
> }
> {code}
> {code}
> java.lang.UnsupportedOperationException: null
> at java.util.AbstractList.set(AbstractList.java:132) ~[?:1.8.0]
> at java.util.AbstractList$ListItr.set(AbstractList.java:426) ~[?:1.8.0]
> at java.util.Collections.sort(Collections.java:170) ~[?:1.8.0]
> at
> org.apache.hadoop.hive.metastore.txn.TxnHandler.allocateTableWriteIds(TxnHandler.java:1523)
> ~[hive-standalone-metastore-server-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> at
> org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.allocate_table_write_ids(HiveMetaStore.java:7349)
> ~[hive-standalone-metastore-server-4.0.0-SNAPSHOT.jar:4.0.0-SNAPSHOT]
> {code}
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