TeslaCN opened a new issue #16301:
URL: https://github.com/apache/shardingsphere/issues/16301
## Bug Report
### Which version of ShardingSphere did you use?
master - edf83226b03c979af77543a34356ad435c330749
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
ShardingSphere-Proxy in memory mode startup succeeded.
### Actual behavior
```
Exception in thread "main" java.lang.NullPointerException: Cannot invoke
"org.apache.shardingsphere.infra.metadata.schema.ShardingSphereSchema.getTables()"
because the return value of
"org.apache.shardingsphere.infra.metadata.ShardingSphereMetaData.getSchema()"
is null
at
org.apache.shardingsphere.infra.federation.optimizer.metadata.FederationMetaData.<init>(FederationMetaData.java:38)
at
org.apache.shardingsphere.infra.federation.optimizer.context.OptimizerContextFactory.create(OptimizerContextFactory.java:47)
at
org.apache.shardingsphere.mode.metadata.MetaDataContextsBuilder.build(MetaDataContextsBuilder.java:113)
at
org.apache.shardingsphere.mode.manager.memory.MemoryContextManagerBuilder.build(MemoryContextManagerBuilder.java:58)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.createContextManager(BootstrapInitializer.java:72)
at
org.apache.shardingsphere.proxy.initializer.BootstrapInitializer.init(BootstrapInitializer.java:57)
at org.apache.shardingsphere.proxy.Bootstrap.main(Bootstrap.java:47)
```
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