Repro for grpc#12958.

Author: kannanjgithub

driver-burst.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+# Drives BurstRepro: proxy + backend + resolver-burst iterations hunting the stale-picker wedge.
+set -u
+
+WORK=pf-stuck-repro
+OUT=$WORK/out-burst
+MODE_FILE=/tmp/proxy-mode
+PROXY_PORT=15001
+BACKEND_PORT=15002
+
+mkdir -p "$OUT"
+exec > >(tee "$OUT/driver.log") 2>&1
+
+ts() { date +%H:%M:%S.%3N; }
+say() { echo "$(ts) [driver] $*"; }
+
+echo pass > "$MODE_FILE"
+python3 "$WORK/proxy.py" $PROXY_PORT $BACKEND_PORT "$MODE_FILE" > "$OUT/proxy.log" 2>&1 &
+PROXY_PID=$!
+say "proxy started pid=$PROXY_PID"
+

examples/build.gradle

@@ -30,6 +30,7 @@ dependencies {
     // Even though client-side won't call grpc-services directly, it needs the
     // dependency to enable the health-aware round_robin implementation
     implementation "io.grpc:grpc-services:${grpcVersion}"
+    implementation "io.grpc:grpc-netty:${grpcVersion}"
     implementation "io.grpc:grpc-stub:${grpcVersion}"
 
     // examples/advanced need this for JsonFormat
@@ -46,7 +47,7 @@ dependencies {
 protobuf {
     protoc { artifact = "com.google.protobuf:protoc:${protocVersion}" }
     plugins {
-        grpc { artifact = "io.grpc:protoc-gen-grpc-java:${grpcVersion}" }
+        grpc { artifact = "io.grpc:protoc-gen-grpc-java:1.83.0" }
     }
     generateProtoTasks {
         all()*.plugins { grpc {} }