ES无痛脚本中的空指针异常？

ES无痛脚本中的空指针异常？,
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,,我在ES中使用无痛脚本，遇到一个空指针异常，这是我的脚本，为了更好地理解，我添加了响应，我使用ES v7.3 POST test_script/_update/1 { "scripted_upsert": true, "script": { "lang": "painless", "source": "int getBrowsersObjectIndex(def

我在ES中使用无痛脚本，遇到一个空指针异常，这是我的脚本，为了更好地理解，我添加了响应，我使用ES v7.3

POST test_script/_update/1
{
  "scripted_upsert": true,
  "script": {
    "lang": "painless",
    "source": "int getBrowsersObjectIndex(def x, def y){for (int i = 0; i < x.length; i++) {if (x[i].deviceType == y.deviceType) {if (x[i].osName == y.osName) {if(x[i].browserName == y.browserName) {return i}}}}return -1} int getDevicesObjectIndex(def x, def y){for (int i = 0; i < x.length; i++) {if (x[i].deviceId == y.deviceId) {if (x[i].appName == y.appName) {if (x[i].appNameSpace == y.appNameSpace){return i}}}}return -1}if (!ctx._source.containsKey('browsers')) {ctx._source['browsers'] = []}if (!ctx._source.containsKey('devices')) {ctx._source['devices'] = []}for (int index = 0; index < params.iterate.length; index++) {if (params.iterate[index].browserObject) {int browserIndex = getBrowsersObjectIndex(ctx._source.browsers, params.iterate[index].browserObject);if (browserIndex >= 0) {ctx._source.browsers.remove(browserIndex);}ctx._source.browsers.add(params.iterate[index].browserObject);}if (params.iterate[index].deviceObject) {int deviceIndex = getDevicesObjectIndex(ctx._source.devices, params.iterate[index].deviceObject);if (deviceIndex >= 0) {ctx._source.devices.remove(deviceIndex);}ctx._source.devices.add(params.iterate[index].deviceObject);}}",
    "params": {
      "iterate": [
        {
          "deviceObject": {
            "deviceId": "162c04e48832e338",
            "appName": "test_app",
            "appNameSpace": "com.test",
            "appBuild": 55,
            "appVersion": "4.6.3",
            "deviceName": "OP4B80L1",
            "manufacturer": "OPPO",
            "model": "CPH1937",
            "networkCarrier": "Jio",
            "os": "Android",
            "platform": "Android",
            "timezone": "Asia/Kolkata",
            "version": "10"
          }
        },
        {
          "browserObject": {
            "deviceType": "mobile",
            "osName": "Android",
            "browserName": "Chrome",
            "osVersion": 10,
            "browserVersion": "80.0.3987.99"
          }
        }
      ]
    }
  },
  "upsert": {}
}

测试后脚本/\u更新/1
{
“脚本式插入”：正确，
“脚本”：{
“郎”：“无痛”，
“source:“int getBrowsersObjectIndex（def x，def y）{for（int i=0；i=0）{ctx.\u source.browsers.browsers.remove（browserIndex）；}ctx.\u source.browsers.add（params.iterate[index].browserObject）；}if（params.iterate[index].deviceObject）{int deviceIndex=getDeviceObjectIndex（ctx.\u source.devices，params.iterate）[index].deviceObject）；如果（deviceIndex>=0）{ctx.\u source.devices.remove（deviceIndex）；}ctx.\u source.devices.add（params.iterate[index].deviceObject）；}，
“参数”：{
“迭代”：[
{
“设备对象”：{
“设备ID”：“162C04E4883238”，
“appName”：“测试应用程序”，
“appNameSpace”：“com.test”，
“appBuild”：55，
“appVersion”：“4.6.3”，
“deviceName”：“OP4B80L1”，
“制造商”：“OPPO”，
“型号”：“CPH1937”，
“网络运营商”：“Jio”，
“操作系统”：“安卓”，
“平台”：“安卓”，
“时区”：“亚洲/加尔各答”，
“版本”：“10”
}
},
{
“browserObject”：{
“设备类型”：“移动设备”，
“osName”：“Android”，
“浏览器名”：“Chrome”，
“osVersion”：10，
“browserVersion”：“80.0.3987.99”
}
}
]
}
},
“向上插入”：{}
}

错误是：

{
  "error": {
    "root_cause": [
      {
        "type": "remote_transport_exception",
        "reason": "[connecto][192.168.36.235:9300][indices:data/write/update[s]]"
      }
    ],
    "type": "illegal_argument_exception",
    "reason": "failed to execute script",
    "caused_by": {
      "type": "script_exception",
      "reason": "runtime error",
      "script_stack": [
        "if (params.iterate[index].browserObject) {int ",
        "                         ^---- HERE"
      ],
      "script": "int getBrowsersObjectIndex(def x, def y){for (int i = 0; i < x.length; i++) {if (x[i].deviceType == y.deviceType) {if (x[i].osName == y.osName) {if(x[i].browserName == y.browserName) {return i}}}}return -1} int getDevicesObjectIndex(def x, def y){for (int i = 0; i < x.length; i++) {if (x[i].deviceId == y.deviceId) {if (x[i].appName == y.appName) {if (x[i].appNameSpace == y.appNameSpace){return i}}}}return -1}if (!ctx._source.containsKey('browsers')) {ctx._source['browsers'] = []}if (!ctx._source.containsKey('devices')) {ctx._source['devices'] = []}for (int index = 0; index < params.iterate.length; index++) {if (params.iterate[index].browserObject) {int browserIndex = getBrowsersObjectIndex(ctx._source.browsers, params.iterate[index].browserObject);if (browserIndex >= 0) {ctx._source.browsers.remove(browserIndex);}ctx._source.browsers.add(params.iterate[index].browserObject);}if (params.iterate[index].deviceObject) {int deviceIndex = getDevicesObjectIndex(ctx._source.devices, params.iterate[index].deviceObject);if (deviceIndex >= 0) {ctx._source.devices.remove(deviceIndex);}ctx._source.devices.add(params.iterate[index].deviceObject);}}",
      "lang": "painless",
      "caused_by": {
        "type": "null_pointer_exception",
        "reason": null
      }
    }
  },
  "status": 400
}

{
“错误”：{
“根本原因”：[
{
“类型”：“远程传输异常”，
“原因”：“[connecto][192.168.36.235:9300][索引：数据/写入/更新]”
}
],
“类型”：“非法参数\异常”，
“原因”：“无法执行脚本”，
“原因”：{
“类型”：“脚本异常”，
“原因”：“运行时错误”，
“脚本堆栈”：[
“如果（params.iterate[index].browserObject）{int”，
“^----这里”
],
“脚本”：“int getBrowsersObjectIndex（def x，def y）{for（int i=0；i=0）{ctx.\u source.browsers.browsers.remove（browserIndex）；}ctx.\u source.browsers.add（params.iterate[index].browserObject）；}if（params.iterate[index].deviceObject）{int deviceIndex=getDeviceObjectIndex（ctx.\u source.devices，params.iterate）[index].deviceObject）；如果（deviceIndex>=0）{ctx.\u source.devices.remove（deviceIndex）；}ctx.\u source.devices.add（params.iterate[index].deviceObject）；}，
“郎”：“无痛”，
“原因”：{
“类型”：“空指针异常”，
“原因”：空
}
}
},
“地位”：400
}

错误似乎出现在if语句中，我正在检查对象迭代数组中是否存在browserObject或deviceObject。您需要执行显式空检查，即

if (params.iterate[index].browserObject != null)

此外，在Kibana开发工具中，您可以使用三重引号

“”“

”，以正确格式化代码，使其更易读、更易于阅读/维护：

POST test_script/_update/1
{
  "scripted_upsert": true,
  "script": {
    "lang": "painless",
    "source": """
    int getBrowsersObjectIndex(def x, def y){
      for (int i = 0; i < x.length; i++) {
        if (x[i].deviceType == y.deviceType) {
          if (x[i].osName == y.osName) {
            if(x[i].browserName == y.browserName) {
              return i
            }
          }
        }
      }
      return -1
    }
    int getDevicesObjectIndex(def x, def y){
      for (int i = 0; i < x.length; i++) {
        if (x[i].deviceId == y.deviceId) {
          if (x[i].appName == y.appName) {
            if (x[i].appNameSpace == y.appNameSpace){
              return i
            }
          }
        }
      }
      return -1
    }
    if (!ctx._source.containsKey('browsers')) {
      ctx._source['browsers'] = []
    }
    if (!ctx._source.containsKey('devices')) {
      ctx._source['devices'] = []
    }
    for (int index = 0; index < params.iterate.length; index++) {
      if (params.iterate[index].browserObject != null) {
        int browserIndex = getBrowsersObjectIndex(ctx._source.browsers, params.iterate[index].browserObject);
        if (browserIndex >= 0) {
          ctx._source.browsers.remove(browserIndex);
        }
        ctx._source.browsers.add(params.iterate[index].browserObject);
      }
      if (params.iterate[index].deviceObject != null) {
        int deviceIndex = getDevicesObjectIndex(ctx._source.devices, params.iterate[index].deviceObject);
        if (deviceIndex >= 0) {
          ctx._source.devices.remove(deviceIndex);
        }
        ctx._source.devices.add(params.iterate[index].deviceObject);
      }
    }
    """,
    "params": {
      "iterate": [
        {
          "deviceObject": {
            "deviceId": "162c04e48832e338",
            "appName": "test_app",
            "appNameSpace": "com.test",
            "appBuild": 55,
            "appVersion": "4.6.3",
            "deviceName": "OP4B80L1",
            "manufacturer": "OPPO",
            "model": "CPH1937",
            "networkCarrier": "Jio",
            "os": "Android",
            "platform": "Android",
            "timezone": "Asia/Kolkata",
            "version": "10"
          }
        },
        {
          "browserObject": {
            "deviceType": "mobile",
            "osName": "Android",
            "browserName": "Chrome",
            "osVersion": 10,
            "browserVersion": "80.0.3987.99"
          }
        }
      ]
    }
  },
  "upsert": {}
}

测试后脚本/\u更新/1
{
“脚本式插入”：正确，
“脚本”：{
“郎”：“无痛”，
“来源”：”
int getBrowsersObjectIndex（定义x，定义y）{
对于（int i=0；i=0）{
ctx.\u source.browsers.remove（browserIndex）；
}
ctx._source.browsers.add（params.iterate[index].browservobject）；
}
if（params.iterate[index].deviceObject！=null）{
int-deviceIndex=GetDeviceObject