com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communications link failure during rollback(). Transaction resolution unknown.

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Communications link failure during rollback(). Transaction resolution unknown.

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Communications link failure during rollback(). Transaction resolution unknown.

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Communications link failure during commit(). Transaction resolution unknown.

com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communications link failure during rollback(). Transaction resolution unknown.	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)	at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)	at com.mysql.jdbc.Util.getInstance(Util.java:386)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1014)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919)	at com.mysql.jdbc.ConnectionImpl.rollback(ConnectionImpl.java:4808)	at com.mysql.jdbc.ConnectionImpl.realClose(ConnectionImpl.java:4403)	at com.mysql.jdbc.ConnectionImpl.close(ConnectionImpl.java:1594)	at org.apache.solr.handler.dataimport.JdbcDataSource.closeConnection(JdbcDataSource.java:400)	at org.apache.solr.handler.dataimport.JdbcDataSource.close(JdbcDataSource.java:391)	at org.apache.solr.handler.dataimport.DocBuilder.closeEntityProcessorWrappers(DocBuilder.java:291)	at org.apache.solr.handler.dataimport.DocBuilder.closeEntityProcessorWrappers(DocBuilder.java:293)	at org.apache.solr.handler.dataimport.DocBuilder.execute(DocBuilder.java:280)	at org.apache.solr.handler.dataimport.DataImporter.doFullImport(DataImporter.java:382)	at org.apache.solr.handler.dataimport.DataImporter.runCmd(DataImporter.java:448)	at org.apache.solr.handler.dataimport.DataImporter$1.run(DataImporter.java:429)