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Re: MySQL database connection error
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created by <a href="https://community.jboss.org/people/pzoli">Zoltan Papp</a> in <i>jBPM</i> - <a href="https://community.jboss.org/message/802725#802725">View the full discussion</a>
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<div class="jive-rendered-content"><blockquote class="jive-quote"><p style="min- padding: 0px;"> <strong>And the second is a MySQL exception, there a lots of tables missings like:</strong></p><p>com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown table 'sequences' in information_schema</p><p>    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) [rt.jar:1.6.0_24]</p><p>    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) [rt.jar:1.6.0_24]</p><p>    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) [rt.jar:1.6.0_24]</p><p>    at java.lang.reflect.Constructor.newInstance(Constructor.java:532) [rt.jar:1.6.0_24]</p><p>    at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)</p><p>    at com.mysql.jdbc.Util.getInstance(Util.java:386)</p><p>    at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1052)</p><p>    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609)</p><p>    at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541)</p><p>    at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002)</p><p>    at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163)</p><p>    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2618)</p><p>    at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2568)</p><p>    at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1557)</p><p>    at org.jboss.jca.adapters.jdbc.WrappedStatement.executeQuery(WrappedStatement.java:340)</p><p>    at org.hibernate.tool.hbm2ddl.DatabaseMetadata.initSequences(DatabaseMetadata.java:149) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.tool.hbm2ddl.DatabaseMetadata.<init>(DatabaseMetadata.java:70) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.tool.hbm2ddl.DatabaseMetadata.<init>(DatabaseMetadata.java:63) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:196) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.tool.hbm2ddl.SchemaUpdate.execute(SchemaUpdate.java:178) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.internal.SessionFactoryImpl.<init>(SessionFactoryImpl.java:457) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1737) [hibernate-core-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.ejb.EntityManagerFactoryImpl.<init>(EntityManagerFactoryImpl.java:84) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:904) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.ejb.Ejb3Configuration.buildEntityManagerFactory(Ejb3Configuration.java:889) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.hibernate.ejb.HibernatePersistence.createContainerEntityManagerFactory(HibernatePersistence.java:73) [hibernate-entitymanager-4.0.1.Final.jar:4.0.1.Final]</p><p>    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.createContainerEntityManagerFactory(PersistenceUnitServiceImpl.java:162) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]</p><p>    at org.jboss.as.jpa.service.PersistenceUnitServiceImpl.start(PersistenceUnitServiceImpl.java:85) [jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final]</p><p>    at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)</p><p>    at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)</p><p>    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.6.0_24]</p><p>    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.6.0_24]</p><p>    at java.lang.Thread.run(Thread.java:679) [rt.jar:1.6.0_24]</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p><strong>My questions are: </strong></p><p><strong>Should I create the MySQL DB schema (I thin I should), and if I should where can I find an SQL script for this?</strong></p><p><strong>The first error  also caused by the DB error?</strong></p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Thanks for your help!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Best Regards,</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Csaba</p></blockquote><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Kedves Csaba!</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>A sequences táblát azért keresi, mert egyedi azonosítót adtál egy táblának, de nincs -vagy rossz- generálási stratégiát adtál hozzá.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>@Entity -> @Id -> @GeneratedValue(strategy=GenerationType.IDENTITY)</p><p>Dobd el előtte a táblákat, hogy újra létrehozza ezeket az entitás tárolókat, és beállítsa a kulcs mezőt a táblára.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>üdv.,</p><p>Zoltán</p></div>
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