错误日志

io.mycat.MycatException: ERROR-CODE: [MYCAT-3036][ERR_INIT_CONFIG] start FileMetadataStorageManager fail
 io.mycat.beans.mycat.MycatErrorCode.createMycatException(MycatErrorCode.java:156)
 io.mycat.config.FileMetadataStorageManager.start(FileMetadataStorageManager.java:211)
 io.mycat.config.FileMetadataStorageManager.start(FileMetadataStorageManager.java:204)
 io.mycat.MycatCore.startServer(MycatCore.java:216)
 io.mycat.MycatCore.main(MycatCore.java:235)
 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 java.lang.reflect.Method.invoke(Method.java:498)
 org.tanukisoftware.wrapper.WrapperSimpleApp.run(WrapperSimpleApp.java:240)
 java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
 java.util.Objects.requireNonNull(Objects.java:203)
 io.mycat.replica.ReplicaSelectorRuntime.registerDatasource(ReplicaSelectorRuntime.java:195)
 io.mycat.replica.ReplicaSelectorRuntime.registerDatasource(ReplicaSelectorRuntime.java:262)
 io.mycat.replica.ReplicaSelectorRuntime.addCluster(ReplicaSelectorRuntime.java:245)
io.mycat.replica.ReplicaSelectorRuntime.<init>(ReplicaSelectorRuntime.java:82)
io.mycat.config.ConfigPrepareExecuter.fullInitBy(ConfigPrepareExecuter.java:181)
io.mycat.config.ConfigPrepareExecuter.prepareRuntimeObject(ConfigPrepareExecuter.java:135)
io.mycat.config.FileMetadataStorageManager.commitAndSyncDisk(FileMetadataStorageManager.java:271)
 io.mycat.config.FileMetadataStorageManager$1.commit(FileMetadataStorageManager.java:250)
 io.mycat.config.FileMetadataStorageManager.start(FileMetadataStorageManager.java:209)

解决方式

查看mycat里面的datasources文件夹，主要是配置问题

要注意

user后面的才是对应账号

{
	"dbType":"mysql",
	"idleTimeout":60000,
	"initSqls":[],
	"initSqlsGetConnection":true,
	"instanceType":"READ_WRITE",
	"maxCon":1000,
	"maxConnectTimeout":3000,
	"maxRetryCount":5,
	"minCon":1,
	"name":"prototypeDs",
	"password":"123456",
	"type":"JDBC",
	"url":"jdbc:mysql://127.0.0.1:3306/study?useUnicode=true&serverTimezone=Asia/Shanghai&characterEncoding=UTF-8",
	"user":"mycat",
	"weight":0
}