Cannot connect to xxx.
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<title>Internal Server Error</title>
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<a id="uLogo" href="./"><span class="logo">ORACLE</span>
REST DATA SERVICES</a>
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<span class="statusCode">500</span> - <span
class="statusMessage">Internal Server Error</span>
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<pre>Request Path passes syntax validation
Mapping request to database pool: PoolMap [_failed=false, _lastUpdate=-1, _pattern=null, _poolName=apex, _regex=null, _type=REGEX, _workspaceIdentifier=null, _serviceName=null]
Applied database connection info
Attempting to process with PL/SQL Gateway
Not processed as PL/SQL Gateway request
Attempting to process as a RESTful Service
Choosing: oracle.dbtools.rt.oauth.TokenHandler as current candidate with score: Score [handle=null, score=0, scope=SecurityConfig [constraint=secure, realm=OAUTH_CLIENT, logonConfig=NONE], originsAllowed=[], corsEnabled=true]
Determining if request can be dispatched as a Tenanted RESTful Service
Request path has one path segment, continuing processing
No Tenant Principal established yet, continuing processing
APEX_LISTENER pool exists, continuing processing
No matching tenant found for: oauth2, cannot dispatch
Chose oracle.dbtools.rt.oauth.TokenHandler as the final candidate with score: Score [handle=null, score=0, scope=SecurityConfig [constraint=secure, realm=OAUTH_CLIENT, logonConfig=NONE], originsAllowed=[], corsEnabled=true] for: POST oauth2/token
oauth2/token authorized as: p6xycV-2QceFnFHkWyJlnA..
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<pre>WebException [statusCode=500]
at oracle.dbtools.rt.web.WebException.webException(WebException.java:343)
at oracle.dbtools.rt.web.WebException.internalError(WebException.java:262)
at oracle.dbtools.rt.oauth.jdbc.JDBCOAuthDataAccess.createApproval(JDBCOAuthDataAccess.java:514)
at oracle.dbtools.rt.oauth.jdbc.JDBCOAuthDataAccess.createApprovedRequest(JDBCOAuthDataAccess.java:181)
at oracle.dbtools.rt.oauth.OAuthAuthorization.resourceOwnerCredentials(OAuthAuthorization.java:666)
at oracle.dbtools.rt.oauth.OAuthAuthorization.tokenRequest(OAuthAuthorization.java:273)
at oracle.dbtools.rt.oauth.TokenHandler.post(TokenHandler.java:44)
at oracle.dbtools.rt.web.RequestHandler.response(RequestHandler.java:268)
at oracle.dbtools.rt.web.RequestHandler.dispatch(RequestHandler.java:361)
at oracle.dbtools.rt.web.RequestHandler.dispatch(RequestHandler.java:85)
at oracle.dbtools.rt.web.RequestDispatchers.dispatch(RequestDispatchers.java:93)
at oracle.dbtools.rt.web.ETags.checkPrecondition(ETags.java:93)
at oracle.dbtools.rt.web.HttpEndpointBase.restfulServices(HttpEndpointBase.java:426)
at oracle.dbtools.rt.web.HttpEndpointBase.service(HttpEndpointBase.java:164)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:857)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:701)
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-02291: integrity constraint (APEX_050000.WWV_FLOW_RT$APPROVALS_SGID_FK) violated - parent key not found
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:447)
at oracle.jdbc.driver.T4CTTIoer.processError(T4CTTIoer.java:396)
at oracle.jdbc.driver.T4C8Oall.processError(T4C8Oall.java:879)
at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:505)
at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:223)
at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531)
at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208)
at oracle.jdbc.driver.T4CPreparedStatement.executeForRows(T4CPreparedStatement.java:1046)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1336)
at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3612)
at oracle.jdbc.driver.OraclePreparedStatement.execute(OraclePreparedStatement.java:3713)
at oracle.jdbc.driver.OraclePreparedStatementWrapper.execute(OraclePreparedStatementWrapper.java:1378)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at oracle.ucp.jdbc.proxy.StatementProxyFactory.invoke(StatementProxyFactory.java:230)
at oracle.ucp.jdbc.proxy.PreparedStatementProxyFactory.invoke(PreparedStatementProxyFactory.java:124)
at com.sun.proxy.$Proxy19.execute(Unknown Source)
at oracle.dbtools.common.jdbc.JDBCInsert.execute(JDBCInsert.java:58)
at oracle.dbtools.rt.oauth.jdbc.JDBCOAuthDataAccess.createApproval(JDBCOAuthDataAccess.java:487)
... 24 more
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It tries to do something with table APEX050000.WWV_FLOW_COMPANIES (hence the error on APEX_050000.WWV_FLOW_RT$APPROVALS_SGID_FK.)