CDSpace中发送post接口，报java.sql.SQLException: Unknown system variable 'tx_isolation'
Wed Apr 22 11:45:03 CST 2020
HTTP/1.1 500 Internal Server Error
<html><head><title>Apache Tomcat/7.0.73 - Error report</title><style><!--H1 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:22px;} H2 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:16px;} H3 {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;font-size:14px;} BODY {font-family:Tahoma,Arial,sans-serif;color:black;background-color:white;} B {font-family:Tahoma,Arial,sans-serif;color:white;background-color:#525D76;} P {font-family:Tahoma,Arial,sans-serif;background:white;color:black;font-size:12px;}A {color : black;}A.name {color : black;}HR {color : #525D76;}--></style> </head><body><h1>HTTP Status 500 - org.hibernate.exception.GenericJDBCException: Cannot open connection</h1><HR size="1" noshade="noshade"><p><b>type</b> Exception report</p><p><b>message</b> <u>org.hibernate.exception.GenericJDBCException: Cannot open connection</u></p><p><b>description</b> <u>The server encountered an internal error that prevented it from fulfilling this request.</u></p><p><b>exception</b> <pre>javax.persistence.PersistenceException: org.hibernate.exception.GenericJDBCException: Cannot open connection
org.hibernate.ejb.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:614)
org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:202)
com.imooc.DAO.StudentDAO.findStudent(StudentDAO.java:27)
com.imooc.DAO.StudentDAO.find(StudentDAO.java:69)
com.imooc.service.StudentService.doPost(StudentService.java:69)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
</pre></p><p><b>root cause</b> <pre>org.hibernate.exception.GenericJDBCException: Cannot open connection
org.hibernate.exception.SQLStateConverter.handledNonSpecificException(SQLStateConverter.java:103)
org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:91)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:29)
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:426)
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
org.hibernate.loader.Loader.doQuery(Loader.java:673)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
org.hibernate.loader.Loader.loadEntity(Loader.java:1860)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3049)
org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:399)
org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:375)
org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:139)
org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:195)
org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:103)
org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:815)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:808)
org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:182)
com.imooc.DAO.StudentDAO.findStudent(StudentDAO.java:27)
com.imooc.DAO.StudentDAO.find(StudentDAO.java:69)
com.imooc.service.StudentService.doPost(StudentService.java:69)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
</pre></p><p><b>root cause</b> <pre>java.sql.SQLException: Unknown system variable 'tx_isolation'
com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3597)
com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3529)
com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1990)
com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2151)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2619)
com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2569)
com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1521)
com.mysql.jdbc.ConnectionImpl.getTransactionIsolation(ConnectionImpl.java:3173)
org.hibernate.connection.DriverManagerConnectionProvider.getConnection(DriverManagerConnectionProvider.java:115)
org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:423)
org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:144)
org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatcher.java:139)
org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1547)
org.hibernate.loader.Loader.doQuery(Loader.java:673)
org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:236)
org.hibernate.loader.Loader.loadEntity(Loader.java:1860)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:48)
org.hibernate.loader.entity.AbstractEntityLoader.load(AbstractEntityLoader.java:42)
org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3049)
org.hibernate.event.def.DefaultLoadEventListener.loadFromDatasource(DefaultLoadEventListener.java:399)
org.hibernate.event.def.DefaultLoadEventListener.doLoad(DefaultLoadEventListener.java:375)
org.hibernate.event.def.DefaultLoadEventListener.load(DefaultLoadEventListener.java:139)
org.hibernate.event.def.DefaultLoadEventListener.proxyOrLoad(DefaultLoadEventListener.java:195)
org.hibernate.event.def.DefaultLoadEventListener.onLoad(DefaultLoadEventListener.java:103)
org.hibernate.impl.SessionImpl.fireLoad(SessionImpl.java:878)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:815)
org.hibernate.impl.SessionImpl.get(SessionImpl.java:808)
org.hibernate.ejb.AbstractEntityManagerImpl.find(AbstractEntityManagerImpl.java:182)
com.imooc.DAO.StudentDAO.findStudent(StudentDAO.java:27)
com.imooc.DAO.StudentDAO.find(StudentDAO.java:69)
com.imooc.service.StudentService.doPost(StudentService.java:69)
javax.servlet.http.HttpServlet.service(HttpServlet.java:650)
javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
</pre></p><p><b>note</b> <u>The full stack trace of the root cause is available in the Apache Tomcat/7.0.73 logs.</u></p><HR size="1" noshade="noshade"><h3>Apache Tomcat/7.0.73</h3></body></html>
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