【背景】
成功启动 FE 之后，通过 mysql 客户端连接报错如下：
ERROR 1064 (HY000): Unknown system variable 'MAX_JOIN_SIZE'
【版本信息】
StarRocks: 1.19.3
MySQL客户端: 5.7.35
【日志信息】
每一次尝试连接，fe.warn.log 会出现以下信息
2021-12-06 16:47:01,002 ERROR (UNKNOWN 192.168.8.60_9010_1638780408208(-1)|1) [QeService.<init>():48] Help module failed, because:
java.io.IOException: Can not find help zip file: help-resource.zip
at com.starrocks.qe.HelpModule.setUpModule(HelpModule.java:267) ~[starrocks-fe.jar:?]
at com.starrocks.qe.QeService.<init>(QeService.java:46) [starrocks-fe.jar:?]
at com.starrocks.StarRocksFE.start(StarRocksFE.java:118) [starrocks-fe.jar:?]
at com.starrocks.StarRocksFE.main(StarRocksFE.java:65) [starrocks-fe.jar:?]
2021-12-06 16:47:03,199 WARN (starrocks-mysql-nio-pool-0|110) [ReadListener.lambda$handleEvent$485():62] Exception happened in one session(com.starrocks.mysql.nio.NConnectContext@7d86b40b).
java.io.IOException: Error happened when receiving packet.
at com.starrocks.qe.ConnectProcessor.processOnce(ConnectProcessor.java:624) ~[starrocks-fe.jar:?]
at com.starrocks.mysql.nio.ReadListener.lambda$handleEvent$485(ReadListener.java:54) ~[starrocks-fe.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_312]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_312]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_312]
2021-12-06 16:47:04,566 WARN (starrocks-mysql-nio-pool-0|110) [ReadListener.lambda$handleEvent$485():62] Exception happened in one session(com.starrocks.mysql.nio.NConnectContext@8695f3c).
java.io.IOException: Error happened when receiving packet.
at com.starrocks.qe.ConnectProcessor.processOnce(ConnectProcessor.java:624) ~[starrocks-fe.jar:?]
at com.starrocks.mysql.nio.ReadListener.lambda$handleEvent$485(ReadListener.java:54) ~[starrocks-fe.jar:?]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_312]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_312]
at java.lang.Thread.run(Thread.java:748) [?:1.8.0_312]