juaihua commented on issue #4884: io.seata.config.ConfigFuture - config operation timeout,cost:5002 ms URL: https://github.com/apache/incubator-shardingsphere/issues/4884#issuecomment-602184851 > Refer: > > * [Apache ShardingSphere 整合 Seata AT 分布式事务](https://www.infoq.cn/article/w6WKHscKTPa3-QMQI4gR) > * [transaction-base-seata-raw-jdbc-example](https://github.com/apache/incubator-shardingsphere/tree/master/examples/sharding-jdbc-example/transaction-example/transaction-base-seata-raw-jdbc-example) yes , i start seata and nocas successfully, but **shard-proxy** response to me this: Exception in thread "main" java.lang.ExceptionInInitializerError at io.seata.tm.TMClient.init(TMClient.java:34) at org.apache.shardingsphere.transaction.base.seata.at.SeataATShardingTransactionManager.initSeataRPCClient(SeataATShardingTransactionManager.java:118) at org.apache.shardingsphere.transaction.base.seata.at.SeataATShardingTransactionManager.init(SeataATShardingTransactionManager.java:55) at org.apache.shardingsphere.transaction.ShardingTransactionManagerEngine.init(ShardingTransactionManagerEngine.java:69) at org.apache.shardingsphere.shardingproxy.backend.communication.jdbc.datasource.JDBCBackendDataSource.<init>(JDBCBackendDataSource.java:68) at org.apache.shardingsphere.shardingproxy.backend.schema.LogicSchema.<init>(LogicSchema.java:63) at org.apache.shardingsphere.shardingproxy.backend.schema.impl.ShardingSchema.<init>(ShardingSchema.java:70) at org.apache.shardingsphere.shardingproxy.backend.schema.LogicSchemaFactory.newInstance(LogicSchemaFactory.java:56) at org.apache.shardingsphere.shardingproxy.backend.schema.LogicSchemas.initSchemas(LogicSchemas.java:104) at org.apache.shardingsphere.shardingproxy.backend.schema.LogicSchemas.init(LogicSchemas.java:94) at org.apache.shardingsphere.shardingproxy.Bootstrap.startWithRegistryCenter(Bootstrap.java:116) at org.apache.shardingsphere.shardingproxy.Bootstrap.main(Bootstrap.java:83) Caused by: io.seata.common.loader.EnhancedServiceNotFoundException: not found service provider for : io.seata.config.ConfigurationProvider[Nacos] and classloader : sun.misc.Launcher$AppClassLoader@b4c966a
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