Jenkins slave cannot connect with master: Incorrect acknowledgement sequence

Question

After update of our Jenkins master installation to its latest LTS version 2.46.3 one of its slaves (Windows 7 machine, 32-bit) cannot connect with the master.

The er

Answer 1

You need to check the secret key of the node is intact. If not proper, you have to download the slave.jar and also Run agent from command line with new jar file.

java -jar slave.jar -jnlpUrl http://:8080/computer//slave-agent.jnlp -secret 340d54sdrgtjj334kelkahsdjkf83f1c5120dc2fb74939fcdb7f05e1926049f8d7991

Also to check the java version installed is > 7