2579836 - AS Java system has performance problem - FCAException - Best practices for tuning recommendations and investigation

While you experience As Java performance problem, you might see in dev_server log files the following error entries:

ERROR => Fca2Conn_getOutBuf(c100d3): Output broken (-7).

Or:

ERROR => FcaIndexPutBuf: FtInsert failed [fcaxxcomm_mt 457]
ERROR => Fca2Conn_postpone(460563): Error while postponing connection to queue 20012 "PJ6_62_623164950_HTTP_WAIT": -3 no more memory for FCA.

Or:

ERROR => FcaFreeBuf: MpiFreeInbufById failed: 14
ERROR => Fca2Conn_close(3003000f): Cannot free InBuffer: -1 FCA internal error occurred.

Additionally, the following exceptions in defaultTrace files might be found:

[...]
500 Internal Server Error is returned for HTTP request
[...]
[EXCEPTION]
com.sap.bc.proj.jstartup.fca.FCAException: Output broken (-7).
[...]

[...]
com.sap.engine.services.webservices.espbase.server.additions.exceptions.ProcessException: Sending response message fails due to IOException. Nested message: Cannot get OutBuffer: -7 connection to partner broken..
[...]
Caused by: com.sap.bc.proj.jstartup.fca.FCAException: Cannot get OutBuffer: -7 connection to partner broken.
[...]

SAP Netweaver for Application Server Java 7.3X/7.4/7.5 as of Kernel version 7.20

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