EndToEndLatency failing

[ph...@orange.com]

Hello my HW/SW is  3 Ubuntu VM  with 3  kafka 0.10 ( kerberized)

i am passing End2End latency test on my cluster and sometimes i got Exception :
"The message read MyTestMessage did not match the message sent "or "only one result  expected during  this test"
There are   transient  errors ;
may i had to be worried ? faulty broker ?
I do not find much info  looking at the End2EndLatency scala code ....

My shell execution   is  ....
kafka-run-class.sh kafka.tools.EndToEndLatency   $MYBrokersURL $TOPIC  55000  1 525  consumer.config.txt ( file with property security.protocol=SASL_PLAINTEXT)

And My  shell trace there :
----------------------------------------------------
[2018-07-05 17:11:37,590] WARN TGT renewal thread has been interrupted and will exit. (org.apache.kafka.common.security.kerberos.KerberosLogin)

Exception in thread "main" java.lang.RuntimeException: The message read [MyTestMessage] did not match the message sent
[IEQBEEN*********   QUX]

       at kafka.tools.EndToEndLatency$$anonfun$main$1.apply$mcVI$sp(EndToEndLatency.scala:120)

       at scala.collection.immutable.Range.foreach$mVc$sp(Range.scala:141)

       at kafka.tools.EndToEndLatency$.main(EndToEndLatency.scala:99)

       at kafka.tools.EndToEndLatency.main(EndToEndLatency.scala)
---------------------------------------------------------

Any idea?
Best regards
Phil

_________________________________________________________________________________________________________________________

Ce message et ses pieces jointes peuvent contenir des informations confidentielles ou privilegiees et ne doivent donc
pas etre diffuses, exploites ou copies sans autorisation. Si vous avez recu ce message par erreur, veuillez le signaler
a l'expediteur et le detruire ainsi que les pieces jointes. Les messages electroniques etant susceptibles d'alteration,
Orange decline toute responsabilite si ce message a ete altere, deforme ou falsifie. Merci.

This message and its attachments may contain confidential or privileged information that may be protected by law;
they should not be distributed, used or copied without authorisation.
If you have received this email in error, please notify the sender and delete this message and its attachments.
As emails may be altered, Orange is not liable for messages that have been modified, changed or falsified.
Thank you.