Question

我通过传输客户端运行一个groovy脚本：脚本如下所示：

if (ctx._source.field.names == null) 
   ctx._source.field.names=newItems 
else 
   ctx._source.field.names<< newItems; 
ctx._source.field.names = ctx._source.field.names.flatten().unique()

我的问题是它大部分时间都有效，但有时我会收到以下错误：

 Caused by: java.lang.IllegalArgumentException: failed to execute script 
   at org.elasticsearch.action.update.UpdateHelper.executeScript(UpdateHelper.java:256) ~[org.elasticsearch.elasticsearch-2.0.1.jar:2.0.1] 
   at org.elasticsearch.action.update.UpdateHelper.prepare(UpdateHelper.java:196) ~[org.elasticsearch.elasticsearch-2.0.1.jar:2.0.1] 
   at org.elasticsearch.action.update.UpdateHelper.prepare(UpdateHelper.java:79) ~[org.elasticsearch.elasticsearch-2.0.1.jar:2.0.1] 
   at org.elasticsearch.action.update.TransportUpdateAction.shardOperation(TransportUpdateAction.java:170) ~[org.elasticsearch.elasticsearch-2.0
   at org.elasticsearch.action.update.TransportUpdateAction$3$1.doRun(TransportUpdateAction.java:227) ~[org.elasticsearch.elasticsearch-2.0.1.
   at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[org.elasticsearch.elasticsearch-2.0.1.jar:2.0.1]
   at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) ~[na:1.8.0_74-cedar14] 
   at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) ~[na:1.8.0_74-cedar14] 
   at java.lang.Thread.run(Thread.java:745) ~[na:1.8.0_74-cedar14] 
 Caused by: org.elasticsearch.script.groovy.GroovyScriptExecutionException: failed to run inline script [if (ctx._source.field.names == null) 
     ctx._source.field.names=newItems 
  else 
     ctx._source.field.names<< newItems; 
     ctx._source.field.names = ctx._source.field.names.flatten().unique()] using lang [groovy] 
    at org.elasticsearch.script.groovy.GroovyScriptEngineService$GroovyScript.run(GroovyScriptEngineService.java:253) ~[org.elasticsearch.
    at org.elasticsearch.action.update.UpdateHelper.executeScript(UpdateHelper.java:251) ~[org.elasticsearch.elasticsearch-2.0.1.jar:2.0.1] 
    ... 8 common frames omitted 
  Caused by: java.lang.NullPointerException: Cannot get property 'names' on null object 
    at org.codehaus.groovy.runtime.NullObject.getProperty(NullObject.java:60) ~[org.codehaus.groovy.groovy-all-2.4.0.jar:2.4.0] 
    at org.codehaus.groovy.runtime.InvokerHelper.getProperty(InvokerHelper.java:172) ~[org.codehaus.groovy.groovy-all-2.4.0.jar:2.4.0] 
    at org.codehaus.groovy.runtime.callsite.NullCallSite.getProperty(NullCallSite.java:47) ~[org.codehaus.groovy.groovy-all-2.4.0.jar:2.4.0] 
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callGetProperty(AbstractCallSite.java:296) ~[org.codehaus.groovy.groovy-all-2.4.0.
    at 889babff0826c95e16279a9fb1fd2eb97a63e642.run(889babff0826c95e16279a9fb1fd2eb97a63e642:1) ~[na:na] 
    at org.elasticsearch.script.groovy.GroovyScriptEngineService$GroovyScript.run(GroovyScriptEngineService.java:248) ~[org.elasticsearch.

这是一个文档示例：

{ 
   "field": {
      "names": ["A","B","C"],
      "A": { "name": "A is awesome" },
      "B": { "name": "B is awesome" },
      "C": { "name": "C is awesome" }
   },
   "email": "x@gmail.com"
}

映射：

"my_index": {
"mappings": {
  "my_type": {
     "properties": {
       "email": {
         "type": "string",
         "analyzer": "email"
       },
       "field": {
         "properties": {
           "A": {
             "properties": {
               "name": {
                 "type": "string",
                 "analyzer": "lowercase"
                }
              }
            },
            "B": {
             "properties": {
               "name": {
                 "type": "string",
                 "analyzer": "lowercase"
                }
              }
            },
            "C": {
             "properties": {
               "name": {
                 "type": "string",
                 "analyzer": "lowercase"
                }
              }
            },
            "names": {
              "type": "string",
              "analyzer": "lowercase"
             }
           }
         }
       }
    }
  }
}

我的代码：

  override def addTerms(id: String, path: String, terms: Set[String]): Future[Unit] = {
    val groovyScript =
      s"""if (ctx._source.$path == null)
          |   ctx._source.$path=newItems
          |else
          |   ctx._source.$path<< newItems;
          |ctx._source.$path = ctx._source.$path.flatten().unique();""".stripMargin
    client.execute(ElasticDsl.update id id in indexName / documentType retryOnConflict 5 script {
      script(groovyScript).params(Map("newItems" -> terms.toArray))
    }).map(_ => Unit)
  }   

  override def update(id: String, field: NestedFieldValue) = {
    client.execute {
      ElasticDsl.update(id) in indexName / documentType retryOnConflict 5 doc field
    }
  }

我查看了脚本失败的文档，并尝试使用curl手动运行此脚本，并且它有效。所以这份文件并不是真正的问题。

我正在为38个文档运行此更新，这意味着它将运行38次。每次从头开始尝试此更新时都会在异常文档上抛出异常（意味着在这38个文档上再次运行它）

不确定我在这里缺少什么。有任何想法吗？谢谢！

Java.lang.NullPointerException：无法在null对象上获取属性'x' - 运行groovy脚本时

0 个答案: