ElasticSearch6.5.0 【script_lang not supported】

执行代码：【就是想根据条件更新】把品牌为LiNing的都改成Cat。

UpdateByQueryRequestBuilder updateByQuery = UpdateByQueryAction.INSTANCE.newRequestBuilder(client);
updateByQuery.source("clothes")
    .size(100)  // 尝试获取的最大文档数
    .filter(QueryBuilders.matchQuery("brand","LiNing"))  // 查询brand=LiNing的
    .script(new Script(
        ScriptType.INLINE, 
        "ctx._source['brand'] = 'Cat'",
        Script.DEFAULT_SCRIPT_LANG,
        Collections.emptyMap()))
    .abortOnVersionConflict(false); // 版本冲突策略：abortOnVersionConflict 版本冲突时不终止

报错如下：

Exception in thread "main" java.lang.IllegalArgumentException: script_lang not supported [ctx._source['brand'] = 'Cat']
    at org.elasticsearch.script.ScriptService.getEngine(ScriptService.java:239)
    at org.elasticsearch.script.ScriptService.compile(ScriptService.java:293)
    at org.elasticsearch.index.reindex.AbstractAsyncBulkByScrollAction$ScriptApplier.apply(AbstractAsyncBulkByScrollAction.java:798)
    at org.elasticsearch.index.reindex.AbstractAsyncBulkByScrollAction$ScriptApplier.apply(AbstractAsyncBulkByScrollAction.java:759)
    at org.elasticsearch.index.reindex.AbstractAsyncBulkByScrollAction.buildBulk(AbstractAsyncBulkByScrollAction.java:207)
    at org.elasticsearch.index.reindex.AbstractAsyncBulkByScrollAction.prepareBulkRequest(AbstractAsyncBulkByScrollAction.java:317)
    at org.elasticsearch.index.reindex.AbstractAsyncBulkByScrollAction$1.doRun(AbstractAsyncBulkByScrollAction.java:280)
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:723)
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
    at org.elasticsearch.index.reindex.WorkerBulkByScrollTaskState$RunOnce.doRun(WorkerBulkByScrollTaskState.java:321)
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
    at org.elasticsearch.index.reindex.WorkerBulkByScrollTaskState$DelayedPrepareBulkRequest$1.doRun(WorkerBulkByScrollTaskState.java:257)
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingAbstractRunnable.doRun(ThreadContext.java:723)
    at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread.java:748)

Process finished with exit code 1

一开始我以为是有依赖没导进来，在网上查有人说要导入groovy-all的包，结果简直是放屁。

现在我们来看官网的示例：

一共四个参数，分别代表：脚本类型、脚本内容、lang，params。我的顺序跟它一模一样，第二个是脚本第三个是lang。真是哔了狗了。

Java客户端API和人家提供的curl方式是有异曲同工之妙的，那我们看一下前端版本：主要看人家的变量命名。

最后，我看Java客户端API的定义！！！顺序是：↓↓↓  我发现 "lang": "painless" 应该在第2个位置！！第3个位置才是脚本内容！！

    public Script(ScriptType type, String lang, String idOrCode, Map<String, Object> params) {
        this(type, lang, idOrCode, type == ScriptType.INLINE ? Collections.emptyMap() : null, params);
    }

麻蛋，官方都搞反了。