fix example tests, pop more connections

Author: ndyakov

example_instrumentation_test.go

@@ -57,8 +57,8 @@ func Example_instrumentation() {
 	// finished dialing tcp :6379
 	// starting processing: <[hello 3]>
 	// finished processing: <[hello 3]>
-	// starting processing: <[client maint_notifications on moving-endpoint-type external-ip]>
-	// finished processing: <[client maint_notifications on moving-endpoint-type external-ip]>
+	// starting processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
+	// finished processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
 	// finished processing: <[ping]>
 }
 
@@ -80,8 +80,8 @@ func ExamplePipeline_instrumentation() {
 	// finished dialing tcp :6379
 	// starting processing: <[hello 3]>
 	// finished processing: <[hello 3]>
-	// starting processing: <[client maint_notifications on moving-endpoint-type external-ip]>
-	// finished processing: <[client maint_notifications on moving-endpoint-type external-ip]>
+	// starting processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
+	// finished processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
 	// pipeline finished processing: [[ping] [ping]]
 }
 
@@ -103,8 +103,8 @@ func ExampleClient_Watch_instrumentation() {
 	// finished dialing tcp :6379
 	// starting processing: <[hello 3]>
 	// finished processing: <[hello 3]>
-	// starting processing: <[client maint_notifications on moving-endpoint-type external-ip]>
-	// finished processing: <[client maint_notifications on moving-endpoint-type external-ip]>
+	// starting processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
+	// finished processing: <[client maint_notifications on moving-endpoint-type internal-fqdn]>
 	// finished processing: <[watch foo]>
 	// starting processing: <[ping]>
 	// finished processing: <[ping]>

internal/pool/pool.go

@@ -26,8 +26,8 @@ var (
 	// popAttempts is the maximum number of attempts to find a usable connection
 	// when popping from the idle connection pool. This handles cases where connections
 	// are temporarily marked as unusable (e.g., during hitless upgrades or network issues).
-	// Value of 10 provides sufficient resilience without excessive overhead.
-	popAttempts = 10
+	// Value of 20 provides sufficient resilience without excessive overhead.
+	popAttempts = 20
 
 	// getAttempts is the maximum number of attempts to get a connection that passes
 	// hook validation (e.g., hitless upgrade hooks). This protects against race conditions