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``` at io.airbyte.api.client.auth.A...
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at io.airbyte.api.client.auth.AirbyteAuthHeaderInterceptor.intercept(AirbyteAuthHeaderInterceptor.kt:28) ~[io.airbyte.airbyte-api-commons-0.63.14.jar:?]
                at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) ~[okhttp-4.12.0.jar:?]
                at io.airbyte.workload.api.client.auth.WorkloadApiAuthenticationInterceptor.intercept(WorkloadApiAuthenticationInterceptor.kt:36) ~[io.airbyte.airbyte-api-workload-api-0.63.14.jar:?]
                at okhttp3.internal.http.RealInterceptorChain.proceed(RealInterceptorChain.kt:109) ~[okhttp-4.12.0.jar:?]
                at okhttp3.internal.connection.RealCall.getResponseWithInterceptorChain$okhttp(RealCall.kt:201) ~[okhttp-4.12.0.jar:?]
                at okhttp3.internal.connection.RealCall.execute(RealCall.kt:154) ~[okhttp-4.12.0.jar:?]
                at io.airbyte.workload.api.client.generated.WorkloadApi.workloadHeartbeatWithHttpInfo(WorkloadApi.kt:2748) ~[io.airbyte.airbyte-api-workload-api-0.63.14.jar:?]
                at io.airbyte.workload.api.client.generated.WorkloadApi.workloadHeartbeat(WorkloadApi.kt:429) ~[io.airbyte.airbyte-api-workload-api-0.63.14.jar:?]
                at io.airbyte.workers.general.ReplicationWorkerHelper.getWorkloadStatusHeartbeat$lambda$1(ReplicationWorkerHelper.kt:153) ~[io.airbyte-airbyte-commons-worker-0.63.14.jar:?]
                at java.base/java.util.concurrent.CompletableFuture$AsyncRun.run(CompletableFuture.java:1804) ~[?:?]
                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.io.EOFException: \n not found: limit=0 content=…
                at okio.RealBufferedSource.readUtf8LineStrict(RealBufferedSource.kt:335) ~[okio-jvm-3.6.0.jar:?]
                at okhttp3.internal.http1.HeadersReader.readLine(HeadersReader.kt:29) ~[okhttp-4.12.0.jar:?]
                at okhttp3.internal.http1.Http1ExchangeCodec.readResponseHeaders(Http1ExchangeCodec.kt:180) ~[okhttp-4.12.0.jar:?]
                ... 26 more
Caused by: java.net.ConnectException: Connection refused
        at java.base/sun.nio.ch.Net.pollConnect(Native Method) ~[?:?]
        at java.base/sun.nio.ch.Net.pollConnectNow(Net.java:682) ~[?:?]
        at java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:549) ~[?:?]
        at java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:592) ~[?:?]
        at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327) ~[?:?]
        at java.base/java.net.Socket.connect(Socket.java:751) ~[?:?]
        at okhttp3.internal.platform.Platform.connectSocket(Platform.kt:128) ~[okhttp-4.12.0.jar:?]
        at okhttp3.internal.connection.RealConnection.connectSocket(RealConnection.kt:295) ~[okhttp-4.12.0.jar:?]
        ... 28 more
u
Based on the error stack trace you've provided, it appears you're encountering a connection issue in Airbyte. This error is similar to those reported in several GitHub issues for Airbyte. Here's an analysis of the problem: 1. The error occurs during a workload heartbeat operation, which is part of Airbyte's internal communication system. 2. The root cause seems to be a 
ConnectException
with the message "Connection refused", indicating that the connection to a required service (likely the workload API server) could not be established. 3. This issue has been reported in Airbyte versions 0.63.14 and 0.63.15, as seen in the error stack traces from the knowledge sources [GitHub Issue #44474](https://github.com/airbytehq/airbyte/issues/44474) and [GitHub Issue #45359](https://github.com/airbytehq/airbyte/issues/45359). 4. The error suggests that there might be network connectivity issues, firewall restrictions, or the target service might be down or unreachable. To resolve this issue, you could try the following: 1. Check if all required Airbyte services are running, especially the workload API server. 2. Verify network connectivity between Airbyte components. 3. Ensure there are no firewall rules blocking the connection. 4. If you're running Airbyte in a containerized environment, check that all necessary port mappings are correct. If the problem persists, you may want to: 1. Check Airbyte's logs for more detailed error messages. 2. Consider upgrading to the latest version of Airbyte, as this issue might have been resolved in a newer release. 3. Report this issue to the Airbyte GitHub repository if you believe it's a bug, providing details about your setup and the steps to reproduce the error. Remember that this analysis is based on similar reported issues, and the exact cause might vary depending on your specific setup and environment.
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