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).
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.
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
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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