See SAP Note 2157722 – Necessary Information and pre-requisites for BW-BEX-ET-WJR* incidents
See also SAP Notes:
1645590 – Java/Server SPs dependencies (and SupportDeskTool)
1515139 – BI data access queries causing OOM crashes in AS JAVA environment
1512355 – SAP NW 7.30/7.31/7.40 : Schedule for BI Java Patch Delivery
1854956 – Common issue with Export to excel
1854937 – Common issue with Export to pdf