Spark 类冲突错误解决方法：自定义 LoadCommand 冲突问题

'Spark \u5df2\u7ecf\u6709\u4e00\u4e2a\u7c7b org.apache.spark.sql.catalyst.plans.logical.Command\uff0c\u7531\u4e8e\u9700\u8981\u6211\u91cd\u65b0\u5b9a\u4e49\u4e00\u4e2a LoadCommand \u5e76\u4e14 extends\u4e86 Command\uff0c\u5728\u5b9e\u9645\u8fd0\u884c\u65f6\u62a5\u4e86\u7c7b\u51b2\u7a81\u7684\u9519\u8bef\u5185\u5bb9\uff1a\u8fd9\u79cd\u7c7b\u51b2\u7a81\u9519\u8bef\u5e38\u5e38\u662f\u7531\u4e8e\u7f16\u8bd1\u65f6\u51fa\u73b0\u4e86\u91cd\u590d\u7684\u7c7b\u5b9a\u4e49\u3002\u5728\u60a8\u7684\u60c5\u51b5\u4e0b\uff0c\u60a8\u7684\u81ea\u5b9a\u4e49 LoadCommand\u7c7b\u4e0e Spark\u4e2d\u7684 Command\u7c7b\u51b2\u7a81\u3002\n\n\u4e3a\u4e86\u89e3\u51b3\u8fd9\u4e2a\u95ee\u9898\uff0c\u60a8\u53ef\u4ee5\u5c1d\u8bd5\u4ee5\u4e0b\u51e0\u79cd\u65b9\u6cd5\uff1a\n\n1. \u6539\u53d8\u60a8\u7684\u81ea\u5b9a\u4e49 LoadCommand\u7c7b\u7684\u540d\u79f0\uff0c\u4ee5\u514d\u906d\u9047\u4e0e Spark\u4e2d\u7684 Command\u7c7b\u53d1\u751f\u51b2\u7a81\u3002\n\n2. \u5982\u679c\u60a8\u771f\u7684\u9700\u8981\u6269\u5c55 Spark\u7684 Command\u7c7b\uff0c\u60a8\u53ef\u4ee5\u628a\u60a8\u7684\u81ea\u5b9a\u4e49\u7c7b\u653e\u5728\u4e00\u4e2a\u7279\u5b9a\u7684\u5305\u4e2d\uff0c\u5e76\u4e14\u786e\u4fdd\u5728\u4f7f\u7528\u65f6\u4f7f\u7528\u5168\u90e8\u7684\u5305\u8def\u5f84\u3002\n\n\u4f8b\u5982\uff0c\u628a\u60a8\u7684\u81ea\u5b9a\u4e49 LoadCommand\u7c7b\u653e\u5728'\u60a8\u7684\u516c\u53f8.spark.extensions'\u5305\u4e2d\uff0c\u5e76\u4e14\u5728\u4f7f\u7528\u65f6\u4f7f\u7528\u5168\u90e8\u7684\u7c7b\u8def\u5f84 com.yourcompany.spark.extensions.LoadCommand\u3002\n\n3. \u68c0\u67e5\u60a8\u7684\u4ee3\u7801\u4e2d\u662f\u5426\u5b58\u5728\u5176\u4ed6\u91cd\u590d\u7684\u7c7b\u5b9a\u4e49\uff0c\u53ef\u80fd\u662f\u7531\u4e8e\u4e0d\u5c0f\u5fc3\u5f15\u5165\u76f8\u540c\u7684\u7c7b\u6216\u8005\u5305\u800c\u5bfc\u81f4\u7684\u51b2\u7a81\u3002\n\n4. \u786e\u4fdd\u60a8\u7684\u9879\u76ee\u4f9d\u8d56\u7ba1\u7406\u6b63\u786e\u914d\u7f6e\uff0c\u4ee5\u514d\u906d\u9047\u5f15\u5165\u91cd\u590d\u7684\u5e93\u6216\u8005\u4f9d\u8d56\u3002\n\n\u5982\u679c\u60a8\u4ecd\u7136\u65e0\u6cd5\u89e3\u51b3\u51b2\u7a81\u9519\u8bef\uff0c\u8bf7\u63d0\u4f9b\u66f4\u591a\u7684\u4ee3\u7801\u548c\u9519\u8bef\u4fe1\u606f\uff0c\u4ee5\u5f80\u6211\u4eec\u80fd\u591f\u66f4\u597d\u7684\u5e2e\u52a9\u60a8\u89e3\u51b3\u95ee\u9898\u3002