AsyncIO feature not disabled through the bootstrap properties

Question & Answer

Question

I experienced a high-CPU loop in our z/OS Connect Enterprise Edition (zCEE) V2.0.7.0 server after enabling the TCP/IP Asynchronous I/O feature (ZOSAIO). I found flash item 1995692, z/OS Systems could become unresponsive and lead to IPL to recover if WebSphere Application Server Liberty z/OS Fix Pack 16.0.0.3 is installed and the new 'Asynchronous I/O' feature is being used, which described the probem as well as a workaround to specify the com.ibm.ws.tcpchannel.useZosAio=false in the bootstrap properties file for the zCEE server running Liberty at the 16.0.0.3 level.

After I added the com.ibm.ws.tcpchannel.useZosAio=false property to the zCEE server bootstrap.properties and recycled, I still see the message in our messages.log:

[1/25/17 18:51:04:327 GMT] 0000001d com.ibm.ws.tcpchannel.internal.ZosAio I CWWKO0229I: Native Asynchronous I/O support for z/OS has been activated.

Is there any other way to disable the AsyncIO feature without having to update our External Security Manager to restrict access to the BBG.AUTHMOD.BBGZSAFM.ZOSAIO resource profile?

[{"Business Unit":{"code":"BU058","label":"IBM Infrastructure w\/TPS"},"Product":{"code":"SSNPJM","label":"IBM z\/OS Connect"},"Platform":[{"code":"PF035","label":"z\/OS"}],"Component":"","Version":"","Line of Business":{"code":"LOB35","label":"Mainframe SW"}}]

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Product Synonym

zCEE

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Document Information

More support for:
IBM z/OS Connect

Operating system(s):
z/OS

Document number:
6138741

Modified date:
14 February 2023

UID

dwa1351636

IBM Support

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