[错误]java.lang.IllegalArgumentException: Index for header 'XXX' is 1 but CSVRecord only has 1 val

aXFD_YY

于 2018-11-10 01:43:11 发布

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分类专栏： NIFI 文章标签： nifi csv

本文链接：https://blog.youkuaiyun.com/aXFD_YY/article/details/83905182

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本文介绍在使用NIFI进行数据处理时遇到的CSVReader配置错误，具体表现为ValueSeparator属性设置不当导致的ArrayIndexOutOfBoundsException异常。通过检查源码，定位到问题所在并给出解决方案。

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NIFI使用过程中报错，查看源码发现越界后会报此错误

    public String get(final String name) {
        if (mapping == null) {
            throw new IllegalStateException(
                "No header mapping was specified, the record values can't be accessed by name");
        }
        final Integer index = mapping.get(name);
        if (index == null) {
            throw new IllegalArgumentException(String.format("Mapping for %s not found, expected one of %s", name,
                mapping.keySet()));
        }
        try {
            return values[index.intValue()];
        } catch (final ArrayIndexOutOfBoundsException e) {
            throw new IllegalArgumentException(String.format(
                "Index for header '%s' is %d but CSVRecord only has %d values!", name, index,
                Integer.valueOf(values.length)));
        }
    }

继续检查发现配置CSVReader时Value Separator属性填写错误，修改后执行成功