Searched on Google with the first line of a JAVA stack trace?

We can recommend more relevant solutions and speed up debugging when you paste your entire stack trace with the exception message. Try a sample exception.

Recommended solutions based on your search

Samebug tips

  1. ,
    via Stack Overflow by KJW

    This seems to be caused by too many connections to the same server, saturating it and causing the exception! More info on the link

Solutions on the web

via Stack Overflow by David
, 1 year ago
Could not open JPA EntityManager for transaction; nested exception is 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
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431) at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:447) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:277) 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.$Proxy28.create(Unknown Source) at main.Main.recupReq(Main.java:353) at main.Main.manageCategories(Main.java:140) at main.Main.transformOldModelToNewModel(Main.java:119) at main.Main.transferXMLtoDB(Main.java:82) at main.Main.main(Main.java:59)Caused by: org.hibernate.exception.JDBCConnectionException: Unable to acquire JDBC Connection at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.java:48) at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:42) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:111) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:97) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:102) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getPhysicalConnection(LogicalConnectionManagedImpl.java:129) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.getConnectionForTransactionManagement(LogicalConnectionManagedImpl.java:247) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.begin(LogicalConnectionManagedImpl.java:254) at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcResourceLocalTransactionCoordinatorImpl$TransactionDriverControlImpl.begin(JdbcResourceLocalTransactionCoordinatorImpl.java:203) at org.hibernate.engine.transaction.internal.TransactionImpl.begin(TransactionImpl.java:56) at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:189) at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) ... 12 moreCaused by: java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:526) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:513) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:505) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:479) at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:489) at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1677) at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:1601) at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:633) at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:347) at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:219) 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:196) at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:159) at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:122) at org.hibernate.internal.NonContextualJdbcConnectionAccess.obtainConnection(NonContextualJdbcConnectionAccess.java:35) at org.hibernate.resource.jdbc.internal.LogicalConnectionManagedImpl.acquireConnectionIfNeeded(LogicalConnectionManagedImpl.java:99) ... 19 moreCaused by: com.mysql.cj.core.exceptions.CJCommunicationsException: The driver was unable to create a connection due to an inability to establish the client portion of a socket.This is usually caused by a limit on the number of sockets imposed by the operating system. This limit is usually configurable. For Unix-based platforms, see the manual page for the 'ulimit' command. Kernel or system reconfiguration may also be required.For Windows-based platforms, see Microsoft Knowledge Base Article 196271 (Q196271). at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:54) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:93) at com.mysql.cj.core.exceptions.ExceptionFactory.createException(ExceptionFactory.java:133) at com.mysql.cj.core.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:149) at com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:83) at com.mysql.cj.mysqla.MysqlaSession.connect(MysqlaSession.java:122) at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:1619) ... 32 moreCaused by: java.net.BindException: Address already in use: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at com.mysql.cj.core.io.StandardSocketFactory.connect(StandardSocketFactory.java:202) at com.mysql.cj.mysqla.io.MysqlaSocketConnection.connect(MysqlaSocketConnection.java:57) ... 34 more