Memory leak in @sap/hana-client v2.7,16

[former_member736993]

Hey everyone,

We noticed that we had a pretty serious memory leak in our application. Upon further investigation we determined that the memory leak came from the updated sap/hana-client. Once we downgraded back to v2.6.61 the memory leak was gone and everything went back to normal.

Here are our memory usage results for the same request, the only difference is the version of sap/hana-client

v 2.7.16

v 2.6.61

[former_member613954]

We're having the exact same problem in our project. Although SQL Server drivers and PostgreSQL drivers work fine without memory leaks, when we run the exact same queries with the Hana client driver, we have this issue.

This can easily be tested by running multiple queries in a for loop. Memory leak grows constantly doing this test.

How can we prevent this issue?

[former_member753340]

you are still leaking memory in the second too. RSS growth.

[simon25]

Hi Luka,

What was the used memory and heap memory consumption of the allocation limit at the timestamps of the leak ?

In the indexserver traces this is usually documented under "exclusive_size_in_use" in order of size under M_HEAP_MEMORY view.

Did you notice any fragmentation > 15% at the time or resource container shrinks with "ShrinkCaller" requests ?

Based on these questions and the information you may find, please review our master FAQ on Memory in HANA :

https://launchpad.support.sap.com/#/notes/1999997

Kind Regards

Simon

[lbreddemann]

This question is about the HANA client software, not about the HANA server.

Checking HANA server memory information likely won't help in this case.