diff --git a/src/nni_manager/training_service/reusable/environments/amlEnvironmentService.ts b/src/nni_manager/training_service/reusable/environments/amlEnvironmentService.ts
index 7b17c5cc4d..1061ad9ba2 100644
--- a/src/nni_manager/training_service/reusable/environments/amlEnvironmentService.ts
+++ b/src/nni_manager/training_service/reusable/environments/amlEnvironmentService.ts
@@ -83,8 +83,8 @@ export class AMLEnvironmentService extends EnvironmentService {
     public async refreshEnvironmentsStatus(environments: EnvironmentInformation[]): Promise<void> {
         environments.forEach(async (environment) => {
             const amlClient = (environment as AMLEnvironmentInformation).amlClient;
-                    if (!amlClient) {
-            throw new Error('AML client not initialized!');
+            if (!amlClient) {
+                return Promise.reject('AML client not initialized!');
             }
             const status = await amlClient.updateStatus(environment.status);
             switch (status.toUpperCase()) {
@@ -99,7 +99,7 @@ export class AMLEnvironmentService extends EnvironmentService {
                     break;
                 case 'FAILED':
                     environment.setFinalStatus('FAILED');
-                    break;
+                    return Promise.reject(`AML: job ${environment.jobId} is failed!`);
                 case 'STOPPED':
                 case 'STOPPING':
                     environment.setFinalStatus('USER_CANCELED');
diff --git a/src/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts b/src/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
index 0d935a6a37..1a527b26f9 100644
--- a/src/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
+++ b/src/nni_manager/training_service/reusable/environments/openPaiEnvironmentService.ts
@@ -121,8 +121,11 @@ export class OpenPaiEnvironmentService extends EnvironmentService {
                                     // RUNNING status is set by runner, and ignore waiting status
                                     break;
                                 case 'SUCCEEDED':
+                                    environment.setFinalStatus(jobResponse.state);
+                                    break;
                                 case 'FAILED':
                                     environment.setFinalStatus(jobResponse.state);
+                                    deferred.reject(`OpenPAI: job ${environment.jobId} is failed!`);
                                     break;
                                 case 'STOPPED':
                                 case 'STOPPING':
diff --git a/src/nni_manager/training_service/reusable/trialDispatcher.ts b/src/nni_manager/training_service/reusable/trialDispatcher.ts
index 156909e129..8d7df06686 100644
--- a/src/nni_manager/training_service/reusable/trialDispatcher.ts
+++ b/src/nni_manager/training_service/reusable/trialDispatcher.ts
@@ -526,19 +526,20 @@ class TrialDispatcher implements TrainingService {
     }
 
     private async handleStdout(commandData: any): Promise<void> {
+        const metricPattern: RegExp = /NNISDK_MEb'(?<metrics>.*a?)'$/gm;
         const trialLogDir: string = path.join(getExperimentRootDir(), 'trials', commandData["trial"]);
         mkDirPSync(trialLogDir);
         const trialLogPath: string = path.join(trialLogDir, 'stdout_log_collection.log');
         try {
             let skipLogging: boolean = false;
             if (commandData["tag"] === 'trial' && commandData["msg"] !== undefined) {
-                const message = commandData["msg"];
-                const metricsContent: any = message.match(this.NNI_METRICS_PATTERN);
-                if (metricsContent && metricsContent.groups) {
+                const message: string = commandData["msg"];
+                let metricsContent = metricPattern.exec(message);
+                while (metricsContent && metricsContent.groups) {
                     const key: string = 'metrics';
                     const data = metricsContent.groups[key];
-                    const metricData = JSON.parse('"' + data.split('"').join('\\"') + '"');
-                    await this.handleMetricData(commandData["trial"], metricData);
+                    await this.handleMetricData(commandData["trial"], data);
+                    metricsContent = metricPattern.exec(message);
                     skipLogging = true;
                 }
             }
diff --git a/tools/nni_trial_tool/base_channel.py b/tools/nni_trial_tool/base_channel.py
index c1ce564ba8..b9d3392abc 100644
--- a/tools/nni_trial_tool/base_channel.py
+++ b/tools/nni_trial_tool/base_channel.py
@@ -57,7 +57,11 @@ def open(self):
 
     def close(self):
         self.is_running = False
-        self._inner_close()
+        try:
+            self._inner_close()
+        except Exception as err:
+            # ignore any error on closing
+            print("error on closing channel: %s" % err)
 
     def send(self, command, data):
         """Send command to Training Service.
diff --git a/tools/nni_trial_tool/web_channel.py b/tools/nni_trial_tool/web_channel.py
index 752a303cb0..8d3830f80a 100644
--- a/tools/nni_trial_tool/web_channel.py
+++ b/tools/nni_trial_tool/web_channel.py
@@ -33,9 +33,9 @@ def _inner_open(self):
     def _inner_close(self):
         if self.client is not None:
             self.client.close()
-            if self._event_loop.is_running():
-                self._event_loop.close()
             self.client = None
+            if self._event_loop.is_running():
+                self._event_loop.stop()
             self._event_loop = None
 
     def _inner_send(self, message):