[ https://issues.apache.org/jira/browse/IMPALA-4551?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Gabor Kaszab reassigned IMPALA-4551: ------------------------------------ Assignee: Gabor Kaszab (was: Joe McDonnell) > Set limits on size of expression trees > -------------------------------------- > > Key: IMPALA-4551 > URL: https://issues.apache.org/jira/browse/IMPALA-4551 > Project: IMPALA > Issue Type: Bug > Components: Backend > Affects Versions: Impala 2.8.0 > Reporter: Tim Armstrong > Assignee: Gabor Kaszab > Priority: Major > Fix For: Impala 3.3.0 > > Attachments: huge_case.patch > > > Very large expression trees can cause havoc in various Impala components. I > have been experimenting with the attached test that generates large case > statements of varying depths and widths, and have been able to hit limits in > the frontend (Java OOM) and caused various runaway memory usage problems in > the backend (thrift structures, LLVM IR, codegen, etc). > We should set some kind of limit here, either on the number of nodes in the > expression trees, or on the size of the query text, and then make sure that > we can execute queries of the maximum size end-to-end. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org