为什么使用SNMP4J而不是Net-SNMP时，查询中的最后一个索引会缺少？

Question

这是snmp4j结果图像 当我使用Net-SNMP时，我可以获取总数据，但是当我使用SNMP4J时，我发现丢失了最后一个数据。 它仅返回8193.和getNext 8193 responsevent.getResponse（）为null。什么是原因？ NET -SNMP命令是：SNMPWALK -V 2C -C'密码'IP 1.3.6.1.2.1.31.1.1.1.1.7 这是net-snmp结果 这是SNMP4J代码：

Snmp snmp = SnmpComunication.getSession(snmpTarget.getSnmpVersion());
Target target = SnmpComunication.getSnmpTarget(snmp, snmpTarget, false);
Map<String, String> resultMap = new HashMap<String, String>();
try {
PDU pdu = null;
 if (snmpTarget.getSnmpVersion() == MessageProcessingModel.MPv3) {
 pdu = new ScopedPDU();
 } else {
 pdu = new PDU();
}
pdu.setType(PDU.GETNEXT);
OID targetOId = new OID(oid);
 pdu.add(new VariableBinding(targetOId));
 boolean matched = true;
while (matched) {
ResponseEvent responseEvent = snmp.send(pdu, target);
if (responseEvent == null || responseEvent.getResponse() == null) {
log.warn(“result is null!responseEvent:{},pdu:{}”,
 JsonUtil.obj2Json(responseEvent),
 JsonUtil.obj2Json(pdu.getVariableBindings()));
break;
}
PDU response = responseEvent.getResponse();
String nextOid = null;
List<? extends VariableBinding> variableBindings = response.getVariableBindings();
for (int i = 0; i < variableBindings.size(); i++) {
VariableBinding variableBinding = variableBindings.get(i);
nextOid = variableBinding.getOid().toDottedString();
 if (nextOid.length() > oid.length() && resultMap.containsKey(nextOid.substring(oid.length() + 1))) {
 log.info(“matched false! oid:{} have same subOid:{}”, oid, nextOid);
 matched = false;
 break;
 }
if (!nextOid.startsWith(oid)) {
log.warn(“matched false!nextOid:{},oid:{}”,nextOid,oid);
 matched = false;
 break;
} else {
String varString = variableBinding.getVariable().toString();
log.info(“current oid:{},value:{}”,nextOid.substring(oid.length() + 1),varString);
resultMap.put(nextOid.substring(oid.length() + 1), varString);
}
}
if (!matched) {
break;
 }
pdu.clear();
pdu.add(new VariableBinding(new OID(nextOid)));
log.info(“next oid:{}”,nextOid);
}
return resultMap;
} catch (Exception e) {
 }
 return null;