TNS-01153: Failed to process string NL-00303: syntax error in NV string

We use to receive the below error in our listener log. There are no errors in terms of connection to the DB from the client side since we can see other sessions in ACTIVE in DB doing the operations.

<txt>TNS-01153: Failed to process string: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=bbdd-ppz000-01.srv.osi)(PORT=50072))(CONNECT_DATA=(CID=(PROGRAM=)(HOST=__jdbc__)(USER=))null))
NL-00303: syntax error in NV string

Follow the note 1364680.1, which says this can occur due to inclusion of multiple JDBC jar files in the classpath and that should be removed.

ORA-09925: Unable to create audit trail file SVR4 Error: 28: No space left on device

I got the below error and even not allows me to connect to DB.In fact there is enough free space in the AUDIT filessytem and all backups fails with this error.

ORA-09925: Unable to create audit trail file
SVR4 Error: 28: No space left on device
Additional information: 9925

Further checking, there was a problem at inode and the filesystem couldnot allow too many files in the filesyste, So, sollution is to move or tar the files so that the next files can be created.