Fix the bug that in the pooled mode, after the isolation occurs, the health…

Fix the bug that in the pooled mode, after the isolation occurs, the health check will not be started.

src/brpc/socket.cpp

@@ -42,7 +42,6 @@
 #include "brpc/shared_object.h"
 #include "brpc/policy/rtmp_protocol.h"  // FIXME
 #include "brpc/periodic_task.h"
-#include "brpc/circuit_breaker.h"       // CircuitBreaker
 #if defined(OS_MACOSX)
 #include <sys/event.h>
 #endif
@@ -880,8 +879,8 @@ int Socket::SetFailed() {
 
 void Socket::FeedbackCircuitBreaker(int error_code, int64_t latency_us) {
     if (!GetOrNewSharedPart()->circuit_breaker.OnCallEnd(error_code, latency_us)) {
-        LOG(ERROR) << "Socket[" << *this << "] deactivted by circuit breaker";
-        SetFailed();
+        LOG(ERROR) << "Socket[" << *this << "] isolated by circuit breaker";
+        SetFailed(main_socket_id());
     }
 }