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After migrating from SAP Business Connector 4.7 to 4.8 the database connection fails with this exception:

code
Caused by: java.lang.UnsupportedClassVersionError: Bad version number in .class file
 at java.lang.ClassLoader.defineClass1(Native Method) ...
 at com.wm.app.b2b.server.DBConnectionManager.getConnection(DBConnectionManager.java:139)
 at pub.db.getConnection(db.java:709)
 at pub.db.doSQLCommand(db.java:540)
 at pub.db.getTables(db.java:439)

The SAP Business Connector 4.7 was running on JVM 1.3 while the 4.8 release requires SPAJVM5. The JDBC drivers has to be replaced with the JVM 5 compatible version.

How can the Business Connector 4.8 connect to a remote server via TLS protocol?

In the Business Connector stopped state, adjust the <server>/config/server.cnf file, set the property:
watt.net.ssl.client.handshake.minVersion=tls

 

How can the SAP Business Connector 4.8 accept TLS protocol instead of SSL?

SAP Business Connector Core Fix 8 provided a fix, #2162591- SAP Business Connector 4.8 Core Fix 8

 

Does SAP Business Connector 4.8 support TLS 1.2?

From Core Fix 9 Hotfix 1 the TLS 1.2 is supported, #2316176 - SAP Business Connector 4.8 and TLS 1.2

How can the SAP Business Connector use strong SSL encryption?

See SAP note #2130281  - How to force the SAP Business Connector acting as client or server to use only strong encryption

The SAP Business Connector 4.8 is hanging, how can a thread dump be captured?

See wiki page How to capture thread dump in SAP Business Connector 4.8

How can the log level be increased?

See page How to change logging level in SAP Business Connector

How SSL debug can be activated in SAP Business Connector 4.8?

See page How to enable SSL debug in SAP Business Connector

How to check the Core Fix and Service Release version in SAP Business Connector 4.8?

See page  How to check Core Fix and Service Release versions in SAP Business Connector

How to troubleshoot SAP Business Connector Developer startup issues

Check SAP KBA ##2811883

 

 

 

 

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