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{page-title}

{kb-symptom}
User encounters the following error on CDP Server startup or while viewing the CDP Server web GUI.

{code}
JDBCConnectionException: Cannot open connection
{code}
Error encountered in SERVER.LOG or Web GUI:


{code}javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Cannot open connection
Caused by: org.hibernate.exception.JDBCConnectionException: Cannot open connection
Caused by: java.sql.SQLNonTransientConnectionException: No current connection.
Caused by: java.sql.SQLException: No current connection.
{code}

Confirm in MONITOR.LOG:

{code}

0000-00-00 00:00:00,000 ERROR  - Page Page(?,Container(?, ?)) could not be written to disk, please check if the disk is full, or if a file system limit, such as a quota or a maximum file size, has been reached.
0000-00-00 00:00:00,000 ERROR  - Java exception: 'No space left on device: java.io.IOException'.
0000-00-00 00:00:00,000 ERROR  - could not complete schema update
0000-00-00 00:00:00,000 ERROR  - No current connection.


{code}

Stack Trace:

{code}

org.hibernate.exception.GenericJDBCException: could not get table metadata: ?
Caused by: java.sql.SQLException: Page Page(?,Container(? ?)) could not be written to disk, please check if the disk is full, or if a file system limit, such as a quota or a maximum file size, has been reached.
Caused by: java.sql.SQLException: Java exception: 'No space left on device: java.io.IOException'.
Caused by: java.io.IOException: No space left on device

{code}


{kb-cause}
There is no free space to write data.



{kb-resolution}
Free up disk space on the Device or move the Disk Safe to a Device that has ample free space.



{kb-related-articles}