Claude
def73fa1c4
Product, order and inventory services behind Spring Cloud Gateway (WebMVC), configuration from a Config Server, discovery with Eureka, a Resilience4j circuit breaker on order -> inventory and Brave tracing. Run as six plain jars; output/ holds real transcripts (config, registry, requests, trace propagation, circuit breaker, startup race and the load-balanced RestClient.Builder trap). Dockerfile and docker-compose.yml are included but were not run. Co-Authored-By: Claude Sonnet 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_01HhW8LD8r3EigoBaCGrQZx5
30 lines
1.7 KiB
Bash
Executable File
30 lines
1.7 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Reproduces the one trap that costs the most time: a load-balanced RestClient.Builder that Eureka's own client picks up.
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# Needs the system running (scripts/start.sh). Starts a second order-service on :8092 WITHOUT the @Primary plain builder,
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# captures what it logs and whether it registered, then stops it. Writes output/06-eureka-lb-trap.txt.
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set -uo pipefail
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cd "$(dirname "$0")/.."
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unset JAVA_TOOL_OPTIONS
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F=output/06-eureka-lb-trap.txt
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LOG=run/logs/order-service-broken.log
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nohup java -Xmx200m -XX:+UseSerialGC -jar order-service/target/order-service-1.0.0.jar \
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--server.port=8092 --shop.demo.primary-builder=false > $LOG 2>&1 &
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echo $! > run/order-service-broken.pid
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sleep 30
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{
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echo "# order-service started with --shop.demo.primary-builder=false (the only RestClient.Builder is the @LoadBalanced one)"
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echo
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echo "--- the log lines that give it away ---"
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grep -m1 "BeanCurrentlyInCreationException" $LOG | sed -E 's/^[^ ]+ +[A-Z]+ [0-9]+ --- \[[^]]*\] \[[^]]*\] \[[^]]*\] //' | cut -c1-220
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grep -m1 "No instances available for localhost" $LOG | sed -E 's/^[^ ]+ +[A-Z]+ [0-9]+ --- \[[^]]*\] \[[^]]*\] \[[^]]*\] //' | cut -c1-220
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grep -m1 "registration failed" $LOG | sed -E 's/^[^ ]+ +[A-Z]+ [0-9]+ --- \[[^]]*\] \[[^]]*\] \[[^]]*\] //' | cut -c1-220
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echo
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echo "--- is instance order-service:8092 in Eureka? ---"
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curl -s -H 'Accept: application/json' localhost:8761/eureka/apps | python3 -c '
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import sys, json
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ids = [i["instanceId"] for a in json.load(sys.stdin)["applications"]["application"] for i in a["instance"]]
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print("order-service:8092 registered:", "order-service:8092" in ids)'
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} > $F
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kill "$(cat run/order-service-broken.pid)" 2>/dev/null; rm -f run/order-service-broken.pid
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cat $F
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