datax-elasticsearchwriter

case NESTED:
case OBJECT:
case GEO_SHAPE:
data.put(columnName, JSON.parse(column.asString()));
break;

fastjson 版本过低，json字符串中有特殊字符导致异常，导致任务终止。

Start in the datax-elasticsearchwriter implementation and inspect the NESTED, OBJECT, and GEO_SHAPE branches containing the JSON.parse call. Reproduce the failure with JSON strings containing special characters, then verify the writer handles that input without terminating the task.

Written by the indexing model from the issue text.