2019-06-26 09:22:51 DEBUG SQL:94 - insert into ysql_hibernate.users (firstName, lastName, userEmail) values (?, ?, ?)
Hibernate: insert into ysql_hibernate.users (firstName, lastName, userEmail) values (?, ?, ?)
2019-06-26 09:22:51 DEBUG SqlExceptionHelper:126 - could not execute statement [n/a]
org.postgresql.util.PSQLException: ERROR: Operation only supported in SERIALIZABLEisolation level
  Hint: See https://github.com/YugaByte/yugabyte-db/issues/1199. Click '+' on the description to raise its priority
	at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2440)
	at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2183)
	at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:308)
	at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)
	at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)
	at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:143)
	at org.postgresql.jdbc.PgPreparedStatement.executeUpdate(PgPreparedStatement.java:120)
	at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:175)
	at org.hibernate.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57)
	at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3079)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3672)
	at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81)
	at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:645)
	at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:282)
	at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:263)
	at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:317)
	at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:332)
	at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:289)
	at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:196)
	at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:127)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:191)
	at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:176)
	at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)
	at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)
	at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:712)
	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:704)
	at org.hibernate.internal.SessionImpl.save(SessionImpl.java:699)
	at com.yugabyte.hibernatedemo.dao.UserDAO.save(UserDAO.java:17)
	at com.yugabyte.hibernatedemo.service.DemoService.create(DemoService.java:36)
	at com.yugabyte.hibernatedemo.server.BasicHttpServer.handleUserPostRequest(BasicHttpServer.java:85)
	at com.yugabyte.hibernatedemo.server.BasicHttpServer.handleUsersRequest(BasicHttpServer.java:73)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:77)
	at jdk.httpserver/sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:82)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:80)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:692)
	at jdk.httpserver/com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:77)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:664)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$DefaultExecutor.execute(ServerImpl.java:159)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.handle(ServerImpl.java:442)
	at jdk.httpserver/sun.net.httpserver.ServerImpl$Dispatcher.run(ServerImpl.java:408)
	at java.base/java.lang.Thread.run(Thread.java:835)
2019-06-26 09:22:51 WARN  SqlExceptionHelper:137 - SQL Error: 0, SQLState: 0A000
2019-06-26 09:22:51 ERROR SqlExceptionHelper:142 - ERROR: Operation only supported in SERIALIZABLEisolation level