improve log: OpenTelemetry span could not be exported

[rrayst]

{"@timestamp":"2025-10-26T07:29:49.356Z","ecs.version":"1.2.0","log.level":"ERROR","message":"Failed to export spans. The request could not be executed. Full error message: Failed to connect to example.predic8.de.de/11.1.1.1:10000","process.thread.name":"OkHttp https://example.predic8.de.de:10000/...","log.logger":"io.opentelemetry.exporter.internal.http.HttpExporter","error.type":"java.net.ConnectException","error.message":"Failed to connect to example.predic8.de.de/11.1.1.1:10000","error.stack_trace":"java.net.ConnectException: Failed to connect to example.predic8.de.de/11.1.1.1:10000\n\tat okhttp3.internal.connection.ConnectPlan.connectSocket(ConnectPlan.kt:282)\n\tat okhttp3.internal.connection.ConnectPlan.connectTcp(ConnectPlan.kt:140)\n\tat okhttp3.internal.connection.FastFallbackExchangeFinder$launchTcpConnect$1.runOnce(FastFallbackExchangeFinder.kt:141)\n\tat okhttp3.internal.concurrent.TaskRunner$runnable$1.run(TaskRunner.kt:81)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\nCaused by: java.net.ConnectException: Connection refused\n\tat java.base/sun.nio.ch.Net.pollConnect(Native Method)\n\tat java.base/sun.nio.ch.Net.pollConnectNow(Net.java:682)\n\tat java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:549)\n\tat java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:592)\n\tat java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)\n\tat java.base/java.net.Socket.connect(Socket.java:751)\n\tat okhttp3.internal.platform.Platform.connectSocket(Platform.kt:147)\n\tat okhttp3.internal.connection.ConnectPlan.connectSocket(ConnectPlan.kt:280)\n\t... 6 more\n"}

and

{"@timestamp":"2025-10-23T06:40:28.974Z","ecs.version":"1.2.0","log.level":"ERROR","message":"Failed to export spans. The request could not be executed. Full error message: Connect timed out","process.thread.name":"OkHttp https://example.predic8.de:10000/...","log.logger":"io.opentelemetry.exporter.internal.http.HttpExporter","error.type":"java.net.SocketTimeoutException","error.message":"Connect timed out","error.stack_trace":"java.net.SocketTimeoutException: Connect timed out\n\tat java.base/sun.nio.ch.NioSocketImpl.timedFinishConnect(NioSocketImpl.java:546)\n\tat java.base/sun.nio.ch.NioSocketImpl.connect(NioSocketImpl.java:592)\n\tat java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:327)\n\tat java.base/java.net.Socket.connect(Socket.java:751)\n\tat okhttp3.internal.platform.Platform.connectSocket(Platform.kt:147)\n\tat okhttp3.internal.connection.ConnectPlan.connectSocket(ConnectPlan.kt:280)\n\tat okhttp3.internal.connection.ConnectPlan.connectTcp(ConnectPlan.kt:140)\n\tat okhttp3.internal.connection.FastFallbackExchangeFinder$launchTcpConnect$1.runOnce(FastFallbackExchangeFinder.kt:141)\n\tat okhttp3.internal.concurrent.TaskRunner$runnable$1.run(TaskRunner.kt:81)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)\n\tat java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)\n\tat java.base/java.lang.Thread.run(Thread.java:1583)\n"}

[rrayst]

seems tricky