checkVersionsCompatibility doesn't support credentials

[jmeyer-accso]

When constructing my Qdrant client to connect to Qdrant Cloud, it always spits out the warning:

Failed to obtain server version. Unable to check client-server compatibility. Set checkCompatibility=false to skip version check.

Looking at the source, checkVersionsCompatibility is called immediately in the Builder constructor:

    Builder(String host, int port, boolean useTransportLayerSecurity, boolean checkCompatibility) {
      String clientVersion = Builder.class.getPackage().getImplementationVersion();
      String javaVersion = System.getProperty("java.version");
      String userAgent = "java-client/" + clientVersion + " java/" + javaVersion;
      this.channel = createChannel(host, port, useTransportLayerSecurity, userAgent);
      this.shutdownChannelOnClose = true;
      if (checkCompatibility) {
        checkVersionsCompatibility(clientVersion);
      }
    }

I reproduced this to see the exception and it turns out the Qdrant cloud returns 403:

io.grpc.StatusRuntimeException: PERMISSION_DENIED: HTTP status code 403
invalid content-type: application/json; charset=utf-8
headers: Metadata(:status=403,content-type=application/json; charset=utf-8,date=Wed, 10 Dec 2025 10:53:47 GMT,content-length=21)
DATA-----------------------------
{"error":"forbidden"}

	at io.grpc.stub.ClientCalls.toStatusRuntimeException(ClientCalls.java:268)
	at io.grpc.stub.ClientCalls.getUnchecked(ClientCalls.java:249)
	at io.grpc.stub.ClientCalls.blockingUnaryCall(ClientCalls.java:167)
	at io.qdrant.client.grpc.QdrantGrpc$QdrantBlockingStub.healthCheck(QdrantGrpc.java:160)
	at de.zdf.pa.partner.shared.model.QdrantModelIntegrationTest$Companion.getServerVersion(QdrantModelIntegrationTest.kt:54)
	at de.zdf.pa.partner.shared.model.QdrantModelIntegrationTest$Companion.access$getServerVersion(QdrantModelIntegrationTest.kt:27)
	at de.zdf.pa.partner.shared.model.QdrantModelIntegrationTest.health check(QdrantModelIntegrationTest.kt:90)
	at java.base/java.lang.reflect.Method.invoke(Method.java:568)

The builder doesn't have any call credentials at this point (and the version check doesn't use it).

[Anush008]

Hey @jmeyer-accso
Thanks for raising the issue. We'll look into this.

cc @tellet-q