question Re: impala queries in Support Questions

impala queries

Malrashed — Wed, 06 Aug 2025 07:56:32 GMT

Dear Cloudera support team ,

I’ve noticed that the Query tab in Impala is not displaying queries run from Hue immediately; they only appear after a delay. Could you please let me know what the issue might be and how it can be resolved?

BR,

Modhi

Re: impala queries

DianaTorres — Fri, 08 Aug 2025 23:18:24 GMT

Hi @jAnshula @Boris G @Saurabhatiyal Do you have any insights here? Thanks!

Re: impala queries

Sean464 — Mon, 11 Aug 2025 08:41:29 GMT

Hello @Malrashed,

We’ll need a few additional details before we can advise further.
From your description, it sounds like the delay occurs only when submitting queries via Hue — specifically, the query takes a while to appear in the Queries tab — while running the same query through impala-shell works as expected. Could you confirm if that’s correct?

If so, do you recall any recent changes made to the cluster before this issue began?
If the delay is limited to Hue, we should check whether it’s a Hue-side latency. In the Hue logs (rungunicorn.log), look for the time difference between:

'ImpalaService.ImpalaHiveServer2Service.Client'>.ExecuteStatement

and

'ImpalaService.ImpalaHiveServer2Service.Client'>.FetchResults

Make sure you match the same guid in both lines so we’re looking at the request/response for the same session. This will help us determine whether the delay is in Hue or elsewhere in the query path.

If you don’t see any delay in Hue, check the agent and Service Monitor logs (cloudera-scm-firehose) to make sure there’s no lag in processing JMX data. Also, verify the CM server logs to make sure there is no GC pauses.

If those logs look clean (no errors or heap issues), try adjusting the polling interval in Cloudera Manager:

CM > Impala > Configuration > query_monitoring_period_seconds

Re: impala queries

jagarwal — Wed, 17 Sep 2025 12:15:38 GMT

Hello @Malrashed

1. How much delay are you observing for queries to appear in CM > Impala > Queries page when queries are executed from Hue?

2. Do you observe the same delay when running queries on Impala-shell?

Re: impala queries

DianaTorres — Wed, 24 Sep 2025 19:56:01 GMT

@Malrashed Has the reply helped resolve your issue? If so, please mark the appropriate reply as the solution, as it will make it easier for others to find the answer in the future. If you are still experiencing the issue, can you provide the information @jagarwal has requested? Thanks.