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https://issues.apache.org/jira/browse/HIVE-21190?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Josh Elser reassigned HIVE-21190:
---------------------------------
Assignee: (was: Josh Elser)
> hive thrift server may be blocked by session level waiting,caused by udf!
> -------------------------------------------------------------------------
>
> Key: HIVE-21190
> URL: https://issues.apache.org/jira/browse/HIVE-21190
> Project: Hive
> Issue Type: Bug
> Components: HiveServer2
> Environment: hdp ambari 26
> hive1.2.0
> Reporter: kongxianghe
> Priority: Critical
> Attachments: session_1.jpg, session_2.jpg
>
>
> # caused by an error UDF function！time_waiting(Long sleepSeconds)
> {code}
> public class UDFTimeWaiting extends UDF throws Exception{
> public String evaluate(String sleepSeconds){
> ...
> Thread.sleep(Long.parseLong(sleepSeconds) * 1000);
> return "ok";
> }
> }
> {code}
> ----
> # in session_1:
> {code}select time_waiting(100);{code}
> # in session_2:
> {code}select 1; or show tables;{code}
> # session_2 will not have any response from thrift server util session_1
> waiting 100 seconds!
> this bug may cause hiveserver come into an unavailable status!
> ----
> # session_1 run waiting 200s,
> !session_1.jpg!
> # session_2 run at the same time ,but blocked by session_1 , see the
> pic,waiting 197s after session_1 returned then returned
> !session_2.jpg!
> ----
> # if someone want to attack or do sth ,hiveserver will not be down,but not
> available again!
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