You have more than one server node on an instance. After a restart only one node gets started. In the dev_server log of one of the failing nodes you see similar entries:
JLaunchISetDebugMode: set debug mode [yes]
*** ERROR => JsfAllocShmAccPoint(localhost.localdomain:1024 Debug): already active at node 2. [jsfxxshm_mt. 5184]
*** ERROR => JsfMarkShmAccPoint(0,1): owned by 4. [jsfxxshm_mt. 5480]
SAP NetWeaver 6.40
SAP NetWeaver 7.0
SAP enhancement package 1 for SAP NetWeaver 7.0
SAP enhancement package 2 for SAP NetWeaver 7.0
SAP enhancement package 3 for SAP NetWeaver 7.0
startup, fail, debug , KBA , BC-JAS-COR , Enterprise Runtime, Core J2EE Framework , BC-JAS-SF , Startup Framework , Problem
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