[jira] [Updated] (HIVE-24291) Compaction Cleaner prematurely cleans up deltas
[ https://issues.apache.org/jira/browse/HIVE-24291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Denys Kuzmenko updated HIVE-24291: -- Affects Version/s: 4.0.0 > Compaction Cleaner prematurely cleans up deltas > --- > > Key: HIVE-24291 > URL: https://issues.apache.org/jira/browse/HIVE-24291 > Project: Hive > Issue Type: Bug >Affects Versions: 4.0.0 >Reporter: Peter Varga >Assignee: Peter Varga >Priority: Major > Labels: pull-request-available > Fix For: 4.0.0-alpha-1 > > Time Spent: 2h 10m > Remaining Estimate: 0h > > Since HIVE-23107 the cleaner can clean up deltas that are still used by > running queries. > Example: > * TxnId 1-5 writes to a partition, all commits > * Compactor starts with txnId=6 > * Long running query starts with txnId=7, it sees txnId=6 as open in its > snapshot > * Compaction commits > * Cleaner runs > Previously min_history_level table would have prevented the Cleaner to delete > the deltas1-5 until txnId=7 is open, but now they will be deleted and the > long running query may fail if its tries to access the files. > Solution could be to not run the cleaner until any txn is open that was > opened before the compaction was committed (CQ_NEXT_TXN_ID) -- This message was sent by Atlassian Jira (v8.20.10#820010)
[jira] [Updated] (HIVE-24291) Compaction Cleaner prematurely cleans up deltas
[ https://issues.apache.org/jira/browse/HIVE-24291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] Denys Kuzmenko updated HIVE-24291: -- Affects Version/s: (was: 4.0.0) > Compaction Cleaner prematurely cleans up deltas > --- > > Key: HIVE-24291 > URL: https://issues.apache.org/jira/browse/HIVE-24291 > Project: Hive > Issue Type: Bug >Reporter: Peter Varga >Assignee: Peter Varga >Priority: Major > Labels: pull-request-available > Fix For: 4.0.0-alpha-1 > > Time Spent: 2h 10m > Remaining Estimate: 0h > > Since HIVE-23107 the cleaner can clean up deltas that are still used by > running queries. > Example: > * TxnId 1-5 writes to a partition, all commits > * Compactor starts with txnId=6 > * Long running query starts with txnId=7, it sees txnId=6 as open in its > snapshot > * Compaction commits > * Cleaner runs > Previously min_history_level table would have prevented the Cleaner to delete > the deltas1-5 until txnId=7 is open, but now they will be deleted and the > long running query may fail if its tries to access the files. > Solution could be to not run the cleaner until any txn is open that was > opened before the compaction was committed (CQ_NEXT_TXN_ID) -- This message was sent by Atlassian Jira (v8.20.10#820010)
[jira] [Updated] (HIVE-24291) Compaction Cleaner prematurely cleans up deltas
[ https://issues.apache.org/jira/browse/HIVE-24291?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ] ASF GitHub Bot updated HIVE-24291: -- Labels: pull-request-available (was: ) > Compaction Cleaner prematurely cleans up deltas > --- > > Key: HIVE-24291 > URL: https://issues.apache.org/jira/browse/HIVE-24291 > Project: Hive > Issue Type: Bug >Reporter: Peter Varga >Assignee: Peter Varga >Priority: Major > Labels: pull-request-available > Time Spent: 10m > Remaining Estimate: 0h > > Since HIVE-23107 the cleaner can clean up deltas that are still used by > running queries. > Example: > * TxnId 1-5 writes to a partition, all commits > * Compactor starts with txnId=6 > * Long running query starts with txnId=7, it sees txnId=6 as open in its > snapshot > * Compaction commits > * Cleaner runs > Previously min_history_level table would have prevented the Cleaner to delete > the deltas1-5 until txnId=7 is open, but now they will be deleted and the > long running query may fail if its tries to access the files. > Solution could be to not run the cleaner until any txn is open that was > opened before the compaction was committed (CQ_NEXT_TXN_ID) -- This message was sent by Atlassian Jira (v8.3.4#803005)
