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\f0\fs24 \cf0 \{\
"AlertDefinition" : \{\
    "cluster_name" : "sparkcluster123",     //Change to your cluster name\
    "component_name" : "RESOURCEMANAGER",     //Change to component using are trying to monitor\
    "description" : "This host-level alert is triggered if cluster yarn memory exceeds 1GB. The threshold values are in Bytes.",  //Change the description \
    "enabled" : true,    //Set to true\
    "help_url" : null,\
    "ignore_host" : false,\
    "interval" : 5,    //Change the interval if you want.\
    "label" : "ResourceManager used Memory ",   //Change the labels\
    "name" : "yarn_used_mem",   //Change the name \
    "repeat_tolerance" : 1,\
    "repeat_tolerance_enabled" : false,\
    "scope" : "ANY",\
    "service_name" : "YARN",\
    "source" : \{\
      "jmx" : \{\
        "property_list" : [\
                "Hadoop:service=ResourceManager,name=QueueMetrics,q0=root/AllocatedMB"   //Change the root of metrics you want to monitor\
                ],\
        "value" : "\{0\}"\
      \},\
      "reporting" : \{\
        "ok" : \{\
          "text" : "Yarn Memory Used \{0\} B"\
        \},\
        "warning" : \{\
          "text" : " Yarn Memory Used \{0\} B",\
          "value" : 1024    //Change the threshold values\
        \},\
        "critical" : \{\
          "text" : "Yarn Memory Used \{0\} B",\
          "value" : 2048\
        \},\
        "units" : "B"     //Change the units like B,m,Bytes,GB \
      \},\
      "type" : "METRIC",    //This type is valid because we are fetching from JMX. \
      "uri" : \{\
        "http" : "\{\{yarn-site/yarn.resourcemanager.webapp.address\}\}",    //We need them for secure environment.\
        "https" : "\{\{yarn-site/yarn.resourcemanager.webapp.https.address\}\}",\
        "https_property" : "\{\{yarn-site/yarn.http.policy\}\}",\
        "https_property_value" : "HTTPS_ONLY",\
        "kerberos_keytab" : "\{\{yarn-site/yarn.resourcemanager.webapp.spnego-keytab-file\}\}",\
        "kerberos_principal" : "\{\{yarn-site/yarn.resourcemanager.webapp.spnego-principal\}\}",\
        "default_port" : 0.0,\
        "connection_timeout" : 5.0,\
        "high_availability" : \{\
          "alias_key" : "\{\{yarn-site/yarn.resourcemanager.ha.rm-ids\}\}",\
          "http_pattern" : "\{\{yarn-site/yarn.resourcemanager.webapp.address.\{\{alias\}\}\}\}",\
          "https_pattern" : "\{\{yarn-site/yarn.resourcemanager.webapp.https.address.\{\{alias\}\}\}\}"\
        \}\
      \}\
    \}\
  \}\
\}\
}