{"record":{"id":"9ebce292eeda63d3","repo":"apache/shardingsphere","slug":"getclientinfo","errorCode":null,"errorMessage":"getClientInfo","messagePattern":"getClientInfo","errorType":"exception","errorClass":"SQLFeatureNotSupportedException","httpStatus":null,"severity":"error","filePath":"jdbc/src/main/java/org/apache/shardingsphere/driver/jdbc/unsupported/AbstractUnsupportedOperationConnection.java","lineNumber":119,"sourceCode":"    \n    @Override\n    public final NClob createNClob() throws SQLException {\n        throw new SQLFeatureNotSupportedException(\"createNClob\");\n    }\n    \n    @Override\n    public final SQLXML createSQLXML() throws SQLException {\n        throw new SQLFeatureNotSupportedException(\"createSQLXML\");\n    }\n    \n    @Override\n    public final Struct createStruct(final String typeName, final Object[] attributes) throws SQLException {\n        throw new SQLFeatureNotSupportedException(\"createStruct\");\n    }\n    \n    @Override\n    public final Properties getClientInfo() throws SQLException {\n        throw new SQLFeatureNotSupportedException(\"getClientInfo\");\n    }\n    \n    @Override\n    public final String getClientInfo(final String name) throws SQLException {\n        throw new SQLFeatureNotSupportedException(\"getClientInfo name\");\n    }\n    \n    @Override\n    public final void setClientInfo(final String name, final String value) {\n        throw new UnsupportedSQLOperationException(\"setClientInfo name value\");\n    }\n    \n    @Override\n    public final void setClientInfo(final Properties props) {\n        throw new UnsupportedSQLOperationException(\"setClientInfo properties\");\n    }\n}\n","sourceCodeStart":101,"sourceCodeEnd":137,"githubUrl":"https://github.com/apache/shardingsphere/blob/e952770a215630a3659c75d64369168cd3e26b82/jdbc/src/main/java/org/apache/shardingsphere/driver/jdbc/unsupported/AbstractUnsupportedOperationConnection.java#L101-L137","documentation":"ShardingSphere's JDBC driver does not implement the java.sql.Connection method getClientInfo (reading all JDBC 4 client info properties set on the connection). The abstract base class AbstractUnsupportedOperationConnection, which ShardingSphereConnection extends, overrides it as final and unconditionally throws SQLFeatureNotSupportedException. ShardingSphere does not store per-connection client info, so both getClientInfo overloads always throw. The exception is thrown the moment the method is invoked on any connection produced by the ShardingSphere Driver.","triggerScenarios":"Calling Connection.getClientInfo() (no-arg) on a ShardingSphere connection.","commonSituations":"Application-performance monitors (APM agents like New Relic, Datadog) that stamp and later read connection metadata; connection pools that propagate user context via client info; debugging utilities dumping connection properties.","solutions":["Remove or guard the getClientInfo() call with a catch of SQLFeatureNotSupportedException.","Carry correlation metadata in a different way: ThreadLocal/MDC for tracing, or application-level context tables.","If backend-native client info is needed (e.g. MySQL session variables), execute SET SESSION statements or unwrap the backend connection instead."],"exampleFix":null,"handlingStrategy":"try-catch","validationCode":"boolean supportsOp = false;\ntry {\n    connection.getMetaData(); // connection is alive\n    // JDBC has no capability flag for individual methods; probe once per JVM:\n    supportsOp = probeSupport(connection); // reflective/one-time guarded call\n} catch (final SQLException ignored) {\n}\n// Simpler and recommended: capability-check by driver URL\nboolean isShardingSphere = url.startsWith(\"jdbc:shardingsphere:\");\nif (isShardingSphere) {\n    // skip the unsupported call, use the alternative API path\n}","typeGuard":null,"tryCatchPattern":"try {\n    connection.getClientInfo(/* args */);\n} catch (final SQLFeatureNotSupportedException e) {\n    // expected on ShardingSphere connections: fall back to supported API\n    log.debug(\"Driver does not support getClientInfo, using fallback\", e);\n}","preventionTips":["APM agents should probe getClientInfo in a guarded try or disable connection-naming via client info for ShardingSphere URLs.","Check the JDBC URL before calling optional JDBC 4 methods: connections starting with jdbc:shardingsphere: never support the lob/network-timeout/client-info/callable APIs.","Catch java.sql.SQLFeatureNotSupportedException (parent of ShardingSphere's UnsupportedSQLOperationException) around optional driver-capability calls so the application degrades gracefully."],"tags":["jdbc","shardingsphere","unsupported-operation","connection-api"],"backgroundTag":null,"analyzedSha":"e952770a215630a3659c75d64369168cd3e26b82","analyzedAt":"2026-08-14T13:54:53.392Z","schemaVersion":2},"datasetVersion":"2026-08-15T17:31:12.345Z"}