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Upgraded IM 10 Backends Doing Full Garbage Collection(GC) Every 4 Or 5 Minutes Since Bringing Up A Second IM 10 Backend (Doc ID 2222803.1)

Last updated on JULY 25, 2018

Applies to:

Oracle Communications Instant Messaging Server - Version 9.0.1.4.0 to 10.0.0 [Release 9.0.1 to 10.0]
Information in this document applies to any platform.

Symptoms

IMv9 + IMv10

We are seeing lag and users getting disconnected on the old IM 9 servers.
We had 5 IM 9 systems running both mux and backend and one pair of IM 10 systems: one mux and one backend.
We ran in that configuration with no problems for about a week.

Today we took down one of the IM 9 systems (leaving 4 IM 9 systems running both mux and backend) and brought up a new pair of IM 10 systems, making 2 IM 10 frontends, each talking only to its respective IM 10 backend.

At about the time we brought up the new backend, the IM 9 backends started doing full garbage collection(GC) every 4 or 5 minutes.

bash-3.2$ grep -i full xmppgc.log
2016-10-07T13:10:10.354-0700: 5559209.745: [Full GC (Allocation Failure) 22G->16G(22G), 137.4248798 secs]
2016-10-19T09:35:12.075-0700: 6583047.179: [Full GC (Allocation Failure) 21G->17G(22G), 144.9429335 secs]
2016-10-19T09:40:30.833-0700: 6583365.917: [Full GC (Allocation Failure) 21G->17G(22G), 151.4987950 secs]
2016-10-19T09:45:40.170-0700: 6583675.235: [Full GC (Allocation Failure) 21G->18G(22G), 154.2858960 secs]
2016-10-19T09:50:11.833-0700: 6583946.881: [Full GC (Allocation Failure) 21G->18G(22G), 157.1751505 secs]
2016-10-19T09:54:29.382-0700: 6584204.414: [Full GC (Allocation Failure) 21G->18G(22G), 160.7321363 secs]
2016-10-19T09:58:29.077-0700: 6584444.093: [Full GC (Allocation Failure) 21G->19G(22G), 162.5043283 secs]
2016-10-19T10:02:15.691-0700: 6584670.693: [Full GC (Allocation Failure) 21G->19G(22G), 160.5319199 secs]
2016-10-19T10:06:23.552-0700: 6584918.538: [Full GC (Allocation Failure) 21G->19G(22G), 158.6959168 secs]
2016-10-19T10:10:28.393-0700: 6585163.365: [Full GC (Allocation Failure) 21G->19G(22G), 160.2954762 secs]

 

Changes

 Upgraded IM 9  to IM 10.

Cause

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In this Document
Symptoms
Changes
Cause
Solution
References


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