fixed: snmpv3 contextName bug (#1473)

README.md

@@ -32,7 +32,7 @@
 * Combines **monitoring, alarm, and notification** features into one platform, and supports monitoring for web service, program, database, cache, os, webserver, middleware, bigdata, cloud-native, network, custom and more.
 * Easy to use and agentless, web-based and with one-click monitoring and alerting, zero learning curve.
 * Makes protocols such as `Http, Jmx, Ssh, Snmp, Jdbc, Prometheus` configurable, allowing you to collect any metrics by simply configuring the template `YML` file online. Imagine being able to quickly adapt to a new monitoring type like K8s or Docker simply by configuring online with HertzBeat.
-* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on gui.
+* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on webui.
 * High performance, supports horizontal expansion of multi-collector clusters, multi-isolated network monitoring and cloud-edge collaboration.
 * Provides flexible alarm threshold rules and timely notifications delivered via  `Discord` `Slack` `Telegram` `Email` `Dingtalk` `WeChat` `FeiShu` `Webhook` `SMS` `ServerChan`.
 

collector/src/main/java/org/dromara/hertzbeat/collector/collect/snmp/SnmpCollectImpl.java

@@ -125,7 +125,8 @@ public void collect(CollectRep.MetricsData.Builder builder, long monitorId, Stri
             String operation = snmpProtocol.getOperation();
             operation = StringUtils.hasText(operation) ? operation : OPERATION_GET;
             if (OPERATION_GET.equalsIgnoreCase(operation)) {
-                PDU pdu = targetBuilder.pdu().type(PDU.GET).oids(snmpProtocol.getOids().values().toArray(new String[0])).contextName(snmpProtocol.getContextName()).build();
+                String contextName = getContextName(snmpProtocol.getContextName());
+                PDU pdu = targetBuilder.pdu().type(PDU.GET).oids(snmpProtocol.getOids().values().toArray(new String[0])).contextName(contextName).build();
                 SnmpCompletableFuture snmpRequestFuture = SnmpCompletableFuture.send(snmpService, target, pdu);
                 List<VariableBinding> vbs = snmpRequestFuture.get().getAll();
                 long responseTime = System.currentTimeMillis() - startTime;
@@ -321,4 +322,8 @@ private TargetBuilder.AuthProtocol getAuthPasswordEncryption(String authPassword
         else if (SHA1.equals(authPasswordEncryption))  return TargetBuilder.AuthProtocol.sha1;
         else return TargetBuilder.AuthProtocol.md5;
     }
+
+    private String getContextName(String contextName) {
+        return contextName == null ? "" : contextName;
+    }
 }

common/src/main/java/org/dromara/hertzbeat/common/entity/job/protocol/SnmpProtocol.java

@@ -81,7 +81,7 @@ public class SnmpProtocol {
     /**
      * contextName
      */
-    private String contextName = "";
+    private String contextName;
 
     /**
      * authPasswordEncryption

home/blog/2023-12-11-hertzbeat-v1.4.3.md

@@ -17,7 +17,7 @@ keywords: [open source monitoring system, alerting system]
 * Combines **monitoring, alarm, and notification** features into one platform, and supports monitoring for web service, program, database, cache, os, webserver, middleware, bigdata, cloud-native, network, custom and more.
 * Easy to use and agentless, web-based and with one-click monitoring and alerting, zero learning curve.
 * Makes protocols such as `Http, Jmx, Ssh, Snmp, Jdbc, Prometheus` configurable, allowing you to collect any metrics by simply configuring the template `YML` file online. Imagine being able to quickly adapt to a new monitoring type like K8s or Docker simply by configuring online with HertzBeat.
-* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on gui.
+* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on webui.
 * High performance, supports horizontal expansion of multi-collector clusters, multi-isolated network monitoring and cloud-edge collaboration.
 * Provides flexible alarm threshold rules and timely notifications delivered via  `Discord` `Slack` `Telegram` `Email` `Dingtalk` `WeChat` `FeiShu` `Webhook` `SMS` `ServerChan`.
 
@@ -42,7 +42,7 @@ keywords: [open source monitoring system, alerting system]
 - add e2e testing module, support by api-testing
 - more feature, document and bugfix
 
-Compatible with the Prometheus ecosystem, now we can monitor what Prometheus can monitoring with few clicks on gui.
+Compatible with the Prometheus ecosystem, now we can monitor what Prometheus can monitoring with few clicks on webui.
 
 
 ### Install Quickly Via Docker

home/docs/introduce.md

@@ -32,7 +32,7 @@ slug: /
 * Combines **monitoring, alarm, and notification** features into one platform, and supports monitoring for web service, program, database, cache, os, webserver, middleware, bigdata, cloud-native, network, custom and more.
 * Easy to use and agentless, web-based and with one-click monitoring and alerting, zero learning curve.
 * Makes protocols such as `Http, Jmx, Ssh, Snmp, Jdbc, Prometheus` configurable, allowing you to collect any metrics by simply configuring the template `YML` file online. Imagine being able to quickly adapt to a new monitoring type like K8s or Docker simply by configuring online with HertzBeat.
-* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on gui.
+* Compatible with the `Prometheus` ecosystem and more, can monitoring what `Prometheus` can monitoring with few clicks on webui.
 * High performance, supports horizontal expansion of multi-collector clusters, multi-isolated network monitoring and cloud-edge collaboration.
 * Provides flexible alarm threshold rules and timely notifications delivered via  `Discord` `Slack` `Telegram` `Email` `Dingtalk` `WeChat` `FeiShu` `Webhook` `SMS` `ServerChan`.