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via Stack Overflow by Othman Chahboune
, 1 year ago
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection
via Stack Overflow by emoleumassi
, 2 years ago
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Could not open connection
via Stack Overflow by Sandipan Biswas
, 1 year ago
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.TransactionException: JDBC begin transaction failed:
via Stack Overflow by user292049
, 2 years ago
Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.TransactionException: JDBC begin transaction failed:
via Stack Overflow by Fatima
, 1 year ago
Could not open JPA EntityManager for transaction; nested exception is org.hibernate.exception.SQLGrammarException: Unable to acquire JDBC Connection
via developpez.net by Unknown author, 1 year ago
Could not open JPA EntityManager for transaction; nested exception is org.hibernate.exception.GenericJDBCException: Unable to acquire JDBC Connection
java.io.EOFException: Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.	at com.mysql.cj.core.io.FullReadInputStream.readFully(FullReadInputStream.java:61)	at com.mysql.cj.mysqla.io.MysqlaProtocol.readPacket(MysqlaProtocol.java:412)	at com.mysql.cj.mysqla.io.MysqlaProtocol.readServerCapabilities(MysqlaProtocol.java:371)	at com.mysql.cj.mysqla.io.MysqlaProtocol.beforeHandshake(MysqlaProtocol.java:334)	at com.mysql.cj.mysqla.io.MysqlaProtocol.connect(MysqlaProtocol.java:1710)	at com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:149)	at com.mysql.cj.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:1803)	at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1673)	at com.mysql.cj.jdbc.ConnectionImpl.(ConnectionImpl.java:656)	at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:349)	at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:221)	at java.sql.DriverManager.getConnection(Unknown Source)	at java.sql.DriverManager.getConnection(Unknown Source)	at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:153)	at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:144)	at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:155)	at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:120)	at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122)	at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:382)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:87)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:112)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:230)	at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:237)	at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:213)	at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:52)	at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1439)	at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:45)	at org.springframework.orm.jpa.DefaultJpaDialect.beginTransaction(DefaultJpaDialect.java:67)	at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380)	at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373)	at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:427)	at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:276)	at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:96)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:213)	at com.sun.proxy.$Proxy25.addClient(Unknown Source)	at test.Test.main(Test.java:12)