2055755 - AS Java does not start after SAP JVM switch

You were using a partner JDK and performed a SAP JVM switch. The AS Java does not start and show this error on the std_server<x>.out log:

[Thr 10440] MtxInit: 10001 0 2
(CompilerOracle read from file D:\usr\sap\PIP\D03\exe\sapjvm_4\jre\.hotspot_compiler)
Invalid layout of java.lang.ClassLoader at uniqueId

...

# Internal Error (d:/depot/bas/sapjvm/41_REL/src/6/hotspot/src/share/vm/classfile/javaClasses.cpp:90), pid=9976, tid=11928
# fatal error: Invalid layout of preloaded class

On the std_server<x>.out you might also see this:

(CompilerOracle read from file \usr\sap\SID\Instance\exe\sapjvm_4\jre\.hotspot_compiler)
Invalid layout of java.lang.ClassLoader at sapDependencies
#
# A fatal error has been detected by the SAP Java Virtual Machine:
#
#  Internal Error (/depot/bas/sapjvm/41_REL/src/6/hotspot/src/share/vm/classfile/javaClasses.cpp:142), pid=9820, tid=9852
#  fatal error: Invalid layout of preloaded class
#
# JRE version:  (1.4.2_34) (build )
# Java VM: SAP Java Server VM (4.1.061 25.51-b12 Apr 19 2016 13:05:11 - 41_REL - optU - windows amd64 - 6 - bas2:267813 (mixed mode) compressed oops)
# No minidump will be written (Minidumps are not enabled)
#
# An error report file with more information is saved as:
# E:\usr\sap\SID\Instance\j2ee\cluster\server0\hs_err_xxx.log
#
# If you would like to submit a bug report, please visit:
#   https://support.sap.com/incident
# Please save the hs_err file(s) and the written dmp file for further error analysis
# See SAP note 1500116 for further information on collecting core dumps after SAPJVM crashes

On the dev_server<x>.out this could be found:

[Thr 9852] *** ERROR => The Java VM aborted unexpectedly.
[Thr 9852] *** Please see SAP Note 943602 , section 'Java VM crashes'
[Thr 9852] *** for additional information and trouble shooting.
[Thr 9852] JLaunchCloseProgram: good bye (exitcode = -2)

And on the hs_err_<xxx>.log file you will see this:

-Xbootclasspath/p:C:/SID/usr/sap/Instancename/SMDXXX/SMDAgent/applications.config/com.sap.smd.agent.application.wily/BytecodeAgent/ISAGENT.8.2.3.5-2011-09-13/wily/connectors/AutoProbeConnector.jar;C:/SID/usr/sap/Instancename/SMDXXX/SMDAgent/applications.config/com.sap.smd.agent.application.wily/BytecodeAgent/ISAGENT.8.2.3.5-2011-09-13/wily/Agent.jar -Dcom.wily.introscope.agent.agentName=SMP_DVEBMGS00_server0 -Dcom.wily.introscope.agentProfile=C:/SID/usr/sap/Instancename/SMDXXX/SMDAgent/applications.config/com.sap.smd.agent.application.wily/BytecodeAgent/ISAGENT.8.2.3.5-2011-09-13/wily/IntroscopeAgent.profile

SAP NetWeaver Application Server Java

Invalid layout of preloaded class, ClassLoader at uniqueId, fatal error, Invalid layout of java.lang.ClassLoader at sapDependencies , KBA , BC-JAS-SF , Startup Framework , XX-PART-WILY , Introscope by CA Technologies , Problem