NullPointerException in AbstractClientSession.getReleasableChannel about cometd HOT 5 CLOSED

This is the server sending to the client an unsuccessful /meta/subscribe message without the subscription field, which is a protocol error, as /meta/subscribe messages MUST contain the subscription field: https://docs.cometd.org/current/reference/#_bayeux_meta_subscribe.

We can improve the error handling on the client, but this looks like a server problem, possibly caused by the client trying to subscribe to a wrong channel.

Also, we can fix this issue in CometD 5 and later, but CometD 4 is at End-Of-Life, see https://docs.cometd.org/current/reference/#_preface.

Also note that very soon, CometD 5 will be End-Of-Community-Support, see #1179.

from cometd.

Hi @reid24 ,

I am also facing this issue frequently for the 4.0.4 version. Please suggest if any solution or workaround

Thanks

from cometd.

Version 4.0.4 is obsolete, please upgrade.
See https://docs.cometd.org/current/reference/.

from cometd.

Hi @sbordet ,

how can i download all the dependencies for the latest version? can you help

Thanks

from cometd.

how can i download all the dependencies for the latest version?

This is typically done by build tools such as Maven or Gradle.

Please read the documentation at https://docs.cometd.org/current/reference/

from cometd.