3320953 - Switch over fails with error "Data transfer to shadow failed" in a high availability configuration

Symptom

A switch over from master to shadow cloud connector triggers an alert: Data transfer to shadow system failed. See "Log And Trace Files" and in particular ljs_trace.log for details.
Issues with the sync of subaccount certificates to the shadow can also be noticed after the certificate renewal in master or after a switch over.
ljs_trace.log from master reports error :

Push transfer failed caused by com.sap.scc.ha.HaHttpClientException: request https://<hostname>:8443/shadow failed with 500 () <!doctype html><html lang="en"><head><title>HTTP Status 500 – Internal Server Error</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 500 – Internal Server Error</h1></body></html> with alert Data transfer to shadow system failed. See ''Log And Trace Files'' and in particular ljs_trace.log for details.
com.sap.scc.ha.PushRequestException: com.sap.scc.ha.HaHttpClientException: request https://<hostname:port>/shadow failed with 500 () <!doctype html><html lang="en"><head><title>HTTP Status 500 – Internal Server Error</title><style type="text/css">body {font-family:Tahoma,Arial,sans-serif;} h1, h2, h3, b {color:white;background-color:#525D76;} h1 {font-size:22px;} h2 {font-size:16px;} h3 {font-size:14px;} p {font-size:12px;} a {color:black;} .line {height:1px;background-color:#525D76;border:none;}</style></head><body><h1>HTTP Status 500 – Internal Server Error</h1></body></html>
at com.sap.scc.ha.PushRequest.failed(PushRequest.java:107)
at com.sap.scc.ha.PushRequest.execute(PushRequest.java:70)
at com.sap.scc.ha.PushRequestChain.execute(PushRequestChain.java:18)
at com.sap.scc.ha.PushToShadow.lambda$new$0(PushToShadow.java:76)
at com.sap.scc.ha.PushRequest.execute(PushRequest.java:78)
at com.sap.scc.ha.PushExecutor.run(PushExecutor.java:52)
at java.lang.Thread.run(Thread.java:838)

ljs_trace.log from shadow reports error :

2023-02-28 09:02:41,001 -0800#TRACE#com.sap.scc.ui#https-jsse-nio2-8443-exec-2# #execute incoming request /shadow with action 'updateConfig'
2023-02-28 09:02:41,001 -0800#DEBUG#com.sap.scc.ui#https-jsse-nio2-8443-exec-2# #Shadow <host>: Master pushes update configuration for <subaccount ID> update type = update
2023-02-28 09:02:41,048 -0800#TRACE#com.sap.scc.ui#https-jsse-nio2-8443-exec-2# #incoming request /shadow action: updateConfig finished after 47 ms
2023-02-28 09:02:41,048 -0800#TRACE#com.sap.scc.ui#https-jsse-nio2-8443-exec-6# #execute incoming request /shadow with action 'updateKeyStore'
2023-02-28 09:02:41,048 -0800#DEBUG#com.sap.scc.ui#https-jsse-nio2-8443-exec-6# #Shadow <host>: Master pushes update keystore for <subaccount ID>
2023-02-28 09:02:41,048 -0800#ERROR#com.sap.scc.ui#https-jsse-nio2-8443-exec-6# #Unhandled runtime exception
java.lang.NullPointerException: while trying to invoke the method com.sap.scc.info.SupportInfo.getSccVersion() of a null object returned from com.sap.scc.ha.PingToMaster.getMasterSupportInfo()

Environment

SAP Cloud Connector 2.15.0 and 2.15.1

Product

connectivity proxy for SAP Connectivity service all versions

Keywords

SAP Cloud Connector, SCC, Switch Roles, Switch Over, Failover, High Availability, 2,15.1, Master, Shadow, HTTP Status 500 – Internal Server Error, Data transfer to shadow failed, , KBA , BC-MID-SCC , SAP Cloud Connector On-Demand/On-Premise Connectivity , Problem

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