[ https://issues.apache.org/jira/browse/IMPALA-7800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zoram Thanga resolved IMPALA-7800. ---------------------------------- Resolution: Fixed Fix Version/s: Impala 3.3.0 > Reject or timeout new incoming connections once --fe_service_threads limit is > reached > ------------------------------------------------------------------------------------- > > Key: IMPALA-7800 > URL: https://issues.apache.org/jira/browse/IMPALA-7800 > Project: IMPALA > Issue Type: Improvement > Components: Clients > Affects Versions: Impala 3.0, Impala 2.12.0 > Reporter: Michael Ho > Assignee: Zoram Thanga > Priority: Major > Fix For: Impala 3.3.0 > > > Currently, the number of frontend service threads is controlled by > {{--fe_service_threads}}. Once this limit is reached, the worker threads of > {{connection_setup_pool}} will block until some of the service threads exit. > New incoming connections will be buffered in a queue in > {{connection_setup_pool}} until it fills up. Currently, there is no time out > for all these buffered connections in the queue. Consequently, if the number > of frontend service threads max'ed out for an extended period of time, a > client trying to connect to Impala will feel "stuck" until a front end > service thread is available. > We should consider either rejecting any new connections once > {{--fe_service_threads}} limit is reached or imposing a tunable upper bound > on the wait time for connections in the queue to improve the users' > experience. cc'ing [~zoram] -- This message was sent by Atlassian JIRA (v7.6.3#76005)