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Fix NPE in alarm content generation. (#1558) 

* Update InstanceReferenceMetricAlarmAssertWorker.java

增加osInfo 判空

* Update InstanceReferenceMetricAlarmAssertWorker.java

增加osinfo 判空
This commit is contained in:
caoyixiong 2018-08-19 10:50:06 +08:00 committed by 彭勇升 pengys
parent 8302bbfdfd
commit a29a8d7c09
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/InstanceReferenceMetricAlarmAssertWorker.java
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@ -68,7 +68,7 @@ public class InstanceReferenceMetricAlarmAssertWorker extends AlarmAssertWorker<
Instance instance = instanceDAO.getInstance(alarm.getBehindInstanceId());
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();
}