Hello Christian & Alex,
thank you very much for your patience and help.
Now it works! The hint from Christian with the “-tcc” flags was the push in the right direction. Instead of using the example from the codelab which uses a older version of sdkperf I needed to use the “new” tcc flags provided by sdkperf.
Now I get the expected result and have a trace which spans from start to finish 
If someone else has struggles like I do - here is the solution that worked in the end.
On the sender sdkperf:
./sdkperf_jms.sh \
-cip=smfs://:55443
-ptl=
-mn=1
-msa=100
-mt=persistent
-cu=@
-cp=
-jcf=
-tcc
-tecip=“http://:4317”
On the receiver sdkperf:
./sdkperf_jms.sh
-cip=smfs://:55443
-sql=
-cu=@
-cp=
-jcf=
-tcrc
-tecip=“http://:4317”
Just a final hint maybe - if you are using the “-tmd” flag provided by sdkperf on the receiver
-tmd Trace message dump. When printing messages, the payload will be decoded
from the protobuf to show trace data (Also sets -md to true)
you will get an error
2023-01-13 09:12:39,997 [Context_2_jms_1_ConsumerDispatcher] ERROR [com.solacesystems.jms.impl.JCSMPMessageListener] Error on async receiving of BytesXMLMessage
java.lang.NoClassDefFoundError: com/google/protobuf/MessageOrBuilder
Not sure if this lib can not be added to sdkperf because of licensing issues but I had to manually download and add it to my lib directory from here Maven Repository: com.google.protobuf » protobuf-java (mvnrepository.com) >
But even after you add it, you still receive an error
2023-01-13 09:11:43,646 [Context_2_jms_1_ConsumerDispatcher] ERROR [com.solacesystems.pubsub.sdkperf.core.AbstractClient] Failed to parse trace:
com.google.protobuf.InvalidProtocolBufferException: While parsing a protocol message, the input ended unexpectedly in the middle of a field. This could mean either that the input has been truncated or that an embedded message misreported its own length.
Not sure if I still did something wrong - but it was not important for me. I just did not use the flag and everything else worked as expected. So I am happy
Greetings,
Jan-Filip.
