HPCCA engine instance count getting increased when there is zero running/pending tasks on broker (GCP)
Article ID: KB0071051
Updated On:
| Products | Versions |
|---|---|
| TIBCO DataSynapse GridServer | - |
Description
When the broker is flooded with some number of tasks and finished all queued tasks and when triggered for scale down of engine instances created by Managed Instance Group(MIG) of GCP then while getting scale down suddenly it starts to create an extra number of engine instances though there are zero tasks pending in brokers queue.
Issue/Introduction
Engine count get scale up when there is no workload on brokerHPCCA engine instance count getting increased when there is zero running/pending tasks on broker (GCP)
Environment
Cloud Provider: GCP
HPCCA: 1.4, 1.5, 2.0
Tibco Datasynapse Gridsrever: 6.x, 7.x
Resolution
In order to fix this issue we need to disable "instance redistribution" property from the Instance Groups from the GCP console.
Please refer attached screenshot where the above setting is highlighted.
Additional Information
https://docs.tibco.com/emp/ds-highperf-comp-cloud/2.0.0/doc/pdf/TIB_ds-highperf-comp-cloud_2.0.0_user-guide.pdf (Page no 7 - Creating an Instance Group on Google Cloud Platform (GCP))
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