menghaoranss commented on a change in pull request #15020:
URL: https://github.com/apache/shardingsphere/pull/15020#discussion_r790649801
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File path:
shardingsphere-features/shardingsphere-db-discovery/shardingsphere-db-discovery-core/src/main/java/org/apache/shardingsphere/dbdiscovery/rule/DatabaseDiscoveryRule.java
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@@ -81,6 +81,7 @@ public DatabaseDiscoveryRule(final String schemaName, final
Map<String, DataSour
private DatabaseDiscoveryRule(final String schemaName, final Map<String,
DataSource> dataSourceMap, final
Collection<DatabaseDiscoveryDataSourceRuleConfiguration> dataSourceRuleConfigs,
final Map<String,
DatabaseDiscoveryHeartBeatConfiguration> heartBeatConfig, final Map<String,
DatabaseDiscoveryType> discoveryTypes) {
+ Preconditions.checkState(!dataSourceMap.isEmpty(), "Data source can
not be is empty.");
Review comment:
Data source can not be empty.
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