ORA-12520: TNS:listener could not find available handler for requested type of server

Cause : oNeno fht enkwo nna dvaiaallb eesvrci eahdnelsrf ror qeeutsdet py efos reev rd(decitadeo rhsrade )ra eparppoirta eof rht elceitnc noentcoi.n

Action - How to fix it : DBA Scripts :: www.high-oracle.com/scripts

uR nl"nscrlts reivec"st oneusert ah tht enitsnaecs( )ahevr gesieter diwhtt ehl sieten rna dhttat eha pporrpaieth naldre sra ecaectpni gocnnceitno.s

update : 23-06-2017

ORA-12520 - TNS:listener could not find available handler for requested type of server
ORA-12520 - TNS:listener could not find available handler for requested type of server

  • ora-00073 : command string takes between string and string argument(s)
  • ora-16715 : redo transport-related property string of standby database "string" is inconsistent
  • ora-27164 : tried to join detached thread
  • ora-23398 : user name "string" at database link "string" does not match local user name "string"
  • ora-13379 : invalid index for sub-element to be extracted
  • ora-16145 : archival for thread# string sequence# string in progress
  • ora-27003 : cannot open file on device allocated with NOIO option
  • ora-19683 : real and backup blocksize of file string are unequal
  • ora-09315 : sql2tt: two-task error translating ORACLE_EXECUTABLE
  • ora-22326 : cannot change a type to FINAL if it has subtypes
  • ora-16177 : media recovery is not required
  • ora-14604 : During CREATE TABLE time it is illegal to specify SUBPARTITIONS or STORE IN once a SUBPARTITION TEMPLATE has been specified
  • ora-01900 : LOGFILE keyword expected
  • ora-13223 : duplicate entry for string in SDO_GEOM_METADATA
  • ora-24125 : Object string.string has changed
  • ora-22892 : scoped table "string" does not exist in schema "string"
  • ora-12334 : database (link name string) is still open
  • ora-07264 : spwat: semop error, unable to decrement semaphore.
  • ora-19685 : SPFILE could not be verified
  • ora-24170 : %s.string is created by AQ, cannot be dropped directly
  • ora-14156 : invalid number of subpartitions specified in [SUBPARTITIONS | SUBPARTITION TEMPLATE] clause
  • ora-12436 : no policy options specified
  • ora-23423 : job number string is not positive
  • ora-14133 : ALTER TABLE MOVE cannot be combined with other operations
  • ora-37042 : (XSACQUIRE_DEP_DEADLOCK) Cannot wait to acquire composite, concat, dimension map, or internal partition workspace object since doing so would cause a deadlock.
  • ora-33265 : (DBERRBSZ) Analytic workspace string cannot be opened. Tablespace blocksize number does not match database cache size number.
  • ora-06906 : CMX: cannot get maximum packet size from CMX
  • ora-12418 : user string not found
  • ora-12322 : unable to mount database (link name string)
  • ora-12566 : TNS:protocol error
  • Oracle Database Error Messages

    Oracle Database High Availability Any organization evaluating a database solution for enterprise data must also evaluate the High Availability (HA) capabilities of the database. Data is one of the most critical business assets of an organization. If this data is not available and/or not protected, companies may stand to lose millions of dollars in business downtime as well as negative publicity. Building a highly available data infrastructure is critical to the success of all organizations in today's fast moving economy.

    Well, the reason for above error is that i have taken the above script from a 11g database and running it on 10g database. 11g has bring some changes in password management. Below code is executed on 11g and user created successfully, which is expected result.