Search Engine: Elastic

Article ID: 131376, created on Aug 29, 2017, last review on Oct 24, 2017

  • Applies to:
  • Operations Automation 7.1


OA Control Panel gets down occasionally while navigating Hosting CP under some provider staff member and switching to More Services tab.

There are a lot of APS application instances created under provider.

The following sequence of messages appears in /var/log/pa/pui/pui.log on the UI node:

00:46:36.222 [default task-135] DEBUG com.tbn.VarResolver - Getting MSS var 'tenant' in scope of
00:46:37.380 [default task-135] DEBUG com.tbn.VarResolver - tenant:[{"aps":{"type":"","id":"8eb67e71-6b66-48f6-a479-70391e940816","status":"aps:ready","revision":356,"modified":"2017-05-19T20:11:52Z","subscription":"8889670e-0e85-435e-9f78-4738bc1a9282"},"AcronisHostedStorage":{"limit":0,"usage":70444413800},"AcronisHostedStorageMbH":{"limit":0,"usage":67182},"MailboxCount":{"limit":0,"usage":0},"MailboxCountItemH":{"limit":0,"usage":0},"MobileDeviceCount":{"limit":0,"usage":0}.
...very long results list at this point...
00:58:06.300 [default task-135] DEBUG com.tbn.ejb.NavApiBean -  690195 ms [NavApi.handleNavigation]
00:58:06.317 [default task-135] WARN  c.p.p.c.u.common.MenuTreeBuilderImpl - Failed to build menu items of plugin com.plesk.p2.cp.core.saas.Application$4@4c43f101
java.lang.RuntimeException: javax.ejb.EJBException: WFLYEJB0442: Unexpected Error
Caused by: java.lang.OutOfMemoryError: Java heap space


APS variable resolution of various APS applications is planned to be improved in terms of memory usage in scope of internal request APS-41609 and APS-43287.


Until the issue is addressed in product, it is recommended to increase Java heap size on all UI nodes, provided that UI node has enough free RAM for the increased memory limit:

  1. Edit /usr/local/pem/wildfly-10.1.0.Final/bin/standalone.conf and replace -Xmx4096m with -Xmx8192m for the JAVA_OPTS variable to increase the limit from 4GB to 8GB (if the current value is less, do the same proportionally, increase it twice).
  2. Restart pau service:

    # service pau restart

5356b422f65bdad1c3e9edca5d74a1ae caea8340e2d186a540518d08602aa065 e12cea1d47a3125d335d68e6d4e15e07 8c199f0ee4305da1a577740620df4a51 1941880841f714e458ae4dc3d9f3062d

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