Cronicle v0.9 has some major dependency updates to patch vulnerabilities:

• Bumped socket.io to v4.4
• Removed mkdirp
• Bumped uglifyjs to v3.14.3
• Bumped shell-quote to v1.7.3
• Bumped pixl-server-storage to v3.0.11

IMPORTANT NOTE

For those upgrading multi-server clusters from v0.8 to v0.9, you must upgrade all of your servers for them to be able to communicate. In v0.9 we have upgraded to socket.io v4.4, which is incompatible with socket.io v1.7.3 that previous Cronicle versions used. We had to upgrade this dependency due to high severity vulnerabilities. Since this is a breaking API change for them, you cannot run "mixed" server clusters with some servers on Cronicle v0.8 and others on v0.9. They all have to be on v0.8 or they all have to be on v0.9.

So, it is recommended that you first disable the main scheduler on your master server (checkbox in top-right corner of the UI), wait for all jobs to complete, then shut down all servers and upgrade them all together. Then start them all up again, and finally re-enable the scheduler.