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Posted to issues-all@impala.apache.org by "Zoltán Borók-Nagy (Jira)" <ji...@apache.org> on 2022/02/25 10:57:00 UTC
[jira] [Updated] (IMPALA-11153) Expose LOCK_RETRIES/LOCK_RETRY_WAIT_SECONDS settings for user
[ https://issues.apache.org/jira/browse/IMPALA-11153?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zoltán Borók-Nagy updated IMPALA-11153:
---------------------------------------
Labels: ramp-up (was: )
> Expose LOCK_RETRIES/LOCK_RETRY_WAIT_SECONDS settings for user
> -------------------------------------------------------------
>
> Key: IMPALA-11153
> URL: https://issues.apache.org/jira/browse/IMPALA-11153
> Project: IMPALA
> Issue Type: Bug
> Components: Catalog, Frontend
> Reporter: Zoltán Borók-Nagy
> Priority: Major
> Labels: ramp-up
>
> Impala using private static final value for lock retry/wait.
> https://github.com/apache/impala/blob/873fe2e5241c5714dfd94a186d524edc1cbad0ad/fe/src/compat-hive-3/java/org/apache/impala/compat/MetastoreShim.java#L142
> {noformat}
> // Number of retries to acquire an HMS ACID lock.
> private static final int LOCK_RETRIES = 10;
> // Time interval between retries of acquiring an HMS ACID lock
> private static final int LOCK_RETRY_WAIT_SECONDS = 3;
> {noformat}
> In some cases it would make sense to make these values tunable.
> We invoke acquireLock() in these places:
> https://github.infra.cloudera.com/CDH/Impala/blob/3ceabc01822f53bb6f174dc29aac56ac3993d389/fe/src/main/java/org/apache/impala/service/Frontend.java#L2169
> https://github.infra.cloudera.com/CDH/Impala/blob/7ae6fff71c860f7623fc0bfd3092073128c4959c/fe/src/main/java/org/apache/impala/catalog/Catalog.java#L745
> invoked by
> https://github.infra.cloudera.com/CDH/Impala/blob/ac62b98ab1d3475d8ece865c67fe90d463c340b5/fe/src/main/java/org/apache/impala/service/CatalogOpExecutor.java#L1936
> In Frontend.java it's easy to access the query options. To have the tunables at the CatalogD -side we probably need to extend TDropTableOrViewParams or TDdlExecRequest.
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