ksqlDB is not starting

[hiraneranda]

Hi guys,
I get above error when running confluent local service. Any thoughts on this. Thanks in advance.

[dtroiano]

Hi @hiraneranda and welcome

Which version of Confluent Platform?

[hiraneranda]

Hey @dtroiano. It’s v7.8.0

[dtroiano]

Hm, I can’t repro this - KsqlDB starts up for me when I run confluent local services start.

What OS and Java version do you have?

Have you changed any configs in your Confluent Platform install? Maybe try with a fresh download:

curl -O https://packages.confluent.io/archive/7.8/confluent-7.8.0.zip
unzip confluent-7.8.0.zip
confluent-7.8.0/bin/confluent local services start

[hiraneranda]

@dtroiano

confluent-7.8.0/bin/confluent local services start

I’m trying this out in Ubuntu and I have javac 21.0.6 installed.
I followed the steps you mentioned and I still get the same error.

sudo /home/hierlk-ubuntu/confluent-7.8.0/bin/ksql-server-start /etc/ksqldb/ksql-server.properties from this I get the error log I previously posted

[dtroiano]

Try downgrading Java to 11 or 17. 21 isn’t supported - I’m not sure if this would be the root cause, but it’s easy enough to try.