Symptom
Connections to all backend systems through SAP Cloud Connector (SCC) were unstable. Messages passing through SCC failed with errors in the ljs_trace.log (<2.17)/scc_core.trc (>=2.17)":
ERROR#com.sap.core.connectivity.spi.processing.AbstractProtocolProcessor#tunnel-client-21-4#Unable to open connection to backend system: No buffer space available (maximum connections reached?): connect: vm-ftp01.w2000.aveve.grp/10.12.8.235:990
io.netty.channel.AbstractChannel$AnnotatedSocketException: No buffer space available (maximum connections reached?): connect: vm-ftp01.w2000.aveve.grp/10.12.8.235:990
Caused by: java.net.SocketException: No buffer space available (maximum connections reached?): connect
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Environment
SAP Cloud Connector
Keywords
No buffer space available (maximum connections reached?), No buffer space available, maximum connections reached , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem
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