[AUTO] Increment version to 2.19.4-SNAPSHOT

[opensearch-trigger-bot]

• Incremented version to 2.19.4-SNAPSHOT.

[dbwiddis]

Can we please try to get this merged? It's been open for 6 weeks and 2.19.4 Code Freeze is less than 3 weeks away.

[dhrubo-os]

I don't think job scheduler has merged their snapshot yet:

* What went wrong:
Could not determine the dependencies of task ':opensearch-ml-plugin:integTest'.
> Could not resolve all files for configuration ':opensearch-ml-plugin:zipArchive'.
   > Could not resolve org.opensearch.plugin:opensearch-job-scheduler:2.19.4.0-SNAPSHOT.
     Required by:
         project :opensearch-ml-plugin
      > Could not resolve org.opensearch.plugin:opensearch-job-scheduler:2.19.4.0-SNAPSHOT.
         > Unable to load Maven meta-data from https://ci.opensearch.org/ci/dbc/snapshots/lucene/org/opensearch/plugin/opensearch-job-scheduler/2.19.4.0-SNAPSHOT/maven-metadata.xml.
            > Could not GET 'https://ci.opensearch.org/ci/dbc/snapshots/lucene/org/opensearch/plugin/opensearch-job-scheduler/2.19.4.0-SNAPSHOT/maven-metadata.xml'. Received status code 403 from server: Forbidden
            

[brianf-aws]

Have the CVE fixes awaiting merge

#4298

Will monitor if

» ERROR][o.o.m.e.a.r.MLSdkAsyncHttpResponseHandler] [integTest-0] Remote service returned error code: 404 with body: {"id":"4e64d590-c2e0-4619-8278-eb4806ffccd8","message":"Generate API was removed on September 15 2025. Please migrate to Chat API. See https://docs.cohere.com/docs/migrating-from-cogenerate-to-cochat for details."}

gets thrown on my PR

[brianf-aws]

netty bump is causing failures making another PR to address the netty build failures

? ERROR][o.o.m.e.a.a.MLAgentExecutor] [integTest-0] Failed to run conversational agent
?  org.opensearch.OpenSearchStatusException: Error communicating with remote model: java.lang.IllegalStateException: unexpected message type: LastHttpContent$1, state: 0
?  	at org.opensearch.ml.engine.algorithms.remote.MLSdkAsyncHttpResponseHandler.onError(MLSdkAsyncHttpResponseHandler.java:108) [opensearch-ml-algorithms-2.19.4.0-SNAPSHOT.jar:?]
?  	at software.amazon.awssdk.http.nio.netty.internal.NettyRequestExecutor.handleFailure(NettyRequestExecutor.java:308) [netty-nio-client-2.30.18.jar:?]
?  	at software.amazon.awssdk.http.nio.netty.internal.NettyRequestExecutor.lambda$writeRequest$13(NettyRequestExecutor.java:262) [netty-nio-client-2.30.18.jar:?]
?  	at io.netty.util.concurrent.DefaultPromise.notifyListener0(DefaultPromise.java:603) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.concurrent.DefaultPromise.notifyListenersNow(DefaultPromise.java:570) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.concurrent.DefaultPromise.notifyListeners(DefaultPromise.java:505) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.concurrent.DefaultPromise.setValue0(DefaultPromise.java:649) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.concurrent.DefaultPromise.setFailure0(DefaultPromise.java:642) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.concurrent.DefaultPromise.tryFailure(DefaultPromise.java:131) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.util.internal.PromiseNotificationUtil.tryFailure(PromiseNotificationUtil.java:64) [netty-common-4.2.5.Final.jar:4.2.5.Final]
?  	at io.netty.channel.AbstractChannelHandlerContext.notifyOutboundHandlerException(AbstractChannelHandlerContext.java:875) [netty-

[brianf-aws]

Using #4339 to track the new PR to solve this 2.19 snapshot Failure .

[gaiksaya]

Closing in favor of #4339