UnknownHostException: airbyte-temporal after updating DB configs

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Summary

The user is facing a java.net.UnknownHostException related to ‘airbyte-temporal’ after updating DB configs to use external postgres. The exception is occurring in the DnsNameResolver class.


Question

After update the DB configs to use external postgres

DATABASE_PASSWORD=******
DATABASE_HOST=*****
DATABASE_PORT=5432
DATABASE_DB=airbyte
# translate manually DATABASE_URL=jdbc:postgresql://${DATABASE_HOST}:${DATABASE_PORT}/${DATABASE_DB} (do not include the username or password here)
DATABASE_URL=jdbc:postgresql://****:5432/airbyte```
I started getting below exception
```Caused by: java.lang.RuntimeException: java.net.UnknownHostException: airbyte-temporal
	at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:223) ~[grpc-core-1.61.0.jar:1.61.0]
	at io.grpc.internal.DnsNameResolver.doResolve(DnsNameResolver.java:282) ~[grpc-core-1.61.0.jar:1.61.0]
	at io.grpc.grpclb.GrpclbNameResolver.doResolve(GrpclbNameResolver.java:63) ~[grpc-grpclb-1.61.0.jar:1.61.0]
	at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:318) ~[grpc-core-1.61.0.jar:1.61.0]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]
Caused by: java.net.UnknownHostException: airbyte-temporal
	at java.base/java.net.InetAddress$CachedLookup.get(InetAddress.java:988) ~[?:?]
	at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818) ~[?:?]
	at java.base/java.net.InetAddress.getAllByName(InetAddress.java:1688) ~[?:?]
	at io.grpc.internal.DnsNameResolver$JdkAddressResolver.resolveAddress(DnsNameResolver.java:632) ~[grpc-core-1.61.0.jar:1.61.0]
	at io.grpc.internal.DnsNameResolver.resolveAddresses(DnsNameResolver.java:219) ~[grpc-core-1.61.0.jar:1.61.0]
	at io.grpc.internal.DnsNameResolver.doResolve(DnsNameResolver.java:282) ~[grpc-core-1.61.0.jar:1.61.0]
	at io.grpc.grpclb.GrpclbNameResolver.doResolve(GrpclbNameResolver.java:63) ~[grpc-grpclb-1.61.0.jar:1.61.0]
	at io.grpc.internal.DnsNameResolver$Resolve.run(DnsNameResolver.java:318) ~[grpc-core-1.61.0.jar:1.61.0]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144) ~[?:?]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642) ~[?:?]
	at java.base/java.lang.Thread.run(Thread.java:1583) ~[?:?]```


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<sub>
["unknownhostexception", "airbyte-temporal", "db-configs", "external-postgres", "dnsnameresolver"]
</sub>