Solution : https://service.sap.com/sap/support/notes/753567 (SAP Service marketplace login required)
Key words :
terms j2ee engine pl22 pl23 portal upgrade hf7 library, api noclassdeffounderror service unavailable 503 missing libraries update reason, delete state/services/file/work/libs, state/services/file/work/libs 4, j2ee engine, service unavailable 503, library jar files, library permanently removes, central library storage, remove & deploy library
Related Notes :
| 743277 | IAIK libraries disappear after upgrade to PL>=22 of 6.20 |