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FIx NPE in InstanceMetricAlarmAssertWorker (#1614) 

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* FIx NPE in InstanceMetricAlarmAssertWorker
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caoyixiong 2018-08-31 18:09:07 +08:00 committed by 彭勇升 pengys
parent cfee02cbf5
commit 9275eeaa7a
1 changed files with 1 additions and 1 deletions
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apm-collector/apm-collector-analysis/analysis-alarm/alarm-provider/src/main/java/org/apache/skywalking/apm/collector/analysis/alarm/provider/worker/instance/InstanceMetricAlarmAssertWorker.java
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@ -66,7 +66,7 @@ public class InstanceMetricAlarmAssertWorker extends AlarmAssertWorker<InstanceM
Instance instance = instanceDAO.getInstance(alarm.getInstanceId());
JsonObject osInfo = gson.fromJson(instance.getOsInfo(), JsonObject.class);
String serverName = Const.UNKNOWN;
if (osInfo.has("hostName")) {
if (osInfo != null && osInfo.has("hostName")) {
serverName = osInfo.get("hostName").getAsString();
}