Geneos - Gateway unable to connect to Obcerv with error "Cannot check peer: missing selected ALPN property"

Issue:

Gateway cannot connect to Obcerv.

Error Message:

2023-09-28 14:14:09.898+0000 INFO: InternalIngestionClient GRPC: subchannel 0x7f09500008c0 {address=ipv4:10.49.83.180:443, args={grpc.client_channel_factory=0x13ba3480, grpc.default_authority=obcerv-ingestion.eks3.ipe.dev.npd.bfsaws.net, grpc.default_compression_algorithm=2, grpc.http2_scheme=https, grpc.internal.channel_credentials=0x7f090c152b40, grpc.internal.event_engine=0x7f095000ccc0, grpc.internal.security_connector=0x7f0950009ee0, grpc.internal.subchannel_pool=0x5fa4650, grpc.primary_user_agent=grpc-c++/1.55.1, grpc.resource_quota=0x11b9e640, grpc.server_uri=dns:///obcerv-ingestion.eks3.ipe.dev.npd.bfsaws.net}}: backoff delay elapsed, reporting IDLE
2023-09-28 14:14:10.009+0000 INFO: InternalIngestionClient GRPC: subchannel 0x7f09500008c0 {address=ipv4:10.49.83.180:443, args={grpc.client_channel_factory=0x13ba3480, grpc.default_authority=obcerv-ingestion.eks3.ipe.dev.npd.bfsaws.net, grpc.default_compression_algorithm=2, grpc.http2_scheme=https, grpc.internal.channel_credentials=0x7f090c152b40, grpc.internal.event_engine=0x7f095000ccc0, grpc.internal.security_connector=0x7f0950009ee0, grpc.internal.subchannel_pool=0x5fa4650, grpc.primary_user_agent=grpc-c++/1.55.1, grpc.resource_quota=0x11b9e640, grpc.server_uri=dns:///obcerv-ingestion.eks3.ipe.dev.npd.bfsaws.net}}: connect failed (UNKNOWN:Cannot check peer: missing selected ALPN property. {created_time:"2023-09-28T14:14:10.008878431+00:00", file_line:133, file:"/home/centos/workspace/GeneosExternals/Build_grpc/grpc-1.55.1/src/core/lib/security/security_connector/ssl_utils.cc"}), backing off for 137061 ms
2023-09-28 14:14:10.049+0000 INFO: InternalIngestionClient GRPC: No root certificates specified; use ones stored in system default locations instead
2023-09-28 14:14:10.049+0000 INFO: InternalIngestionClient GRPC: No root certificates specified; use ones stored in system default locations instead
2023-09-28 14:14:10.123+0000 INFO: InternalIngestionClient GRPC Channel state switched to Transient Failure

Cause:

The load balancer between the gateway and the Obcerv instance was originally configured with ALPN = NONE. 

Resolution:

Once they have set it the correct way data started flowing.

If you have any further questions:

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