Unable to connect to EM using Workstation Client. There is the following message when connecting to the EM using the Workstation Client. Sometimes a restart of APM allows temporarily reconnecting to the application. Also noticed that it doesn't disconnect an user who is already connected.
4/17/19 10:30:41.721 AM CEST [ERROR] [pool-35-thread-5] [org.springframework.scheduling.support.TaskUtils$LoggingErrorHandler] Unexpected error occurred in scheduled task. org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLTransientConnectionException: HikariPool-1 - Connection is not available, request timed out after 30000ms. at org.springframework.jdbc.datasource.DataSourceTransactionManager.doBegin(DataSourceTransactionManager.java:289) at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:377) at org.springframework.transaction.interceptor.TransactionAspectSupport.createTransactionIfNecessary(TransactionAspectSupport.java:461) at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:277)
Per Engineering, this seems be a bug,
However, there is a workaround - Restart the EM and will be able to login through the Workstation client.
Introscope Workstation Release 10.7.0.115 (Build 991408) Java VM version "Java HotSpot(TM) Client VM 1.8.0_112" from Oracle Corporation
Open a support case to obtain the fix - APM10.7.0HF15_cumulative.zip