2107660 - Error 632 or memory corruption with stacktrace when accessing text/image data - SAP ASE

• The ASE server is upgraded, probably recently, from a pre-15.7 release (12.5.x, 15.0.x or 15.5) to a 15.7 or 16.0 release.
   
• After the ASE upgrade, attempts to access text/image column data fail with any of a variety of the following symptoms:
   
• Error 632 when accessing text/image column data is the most common symptom encountered under these conditions:

Error: 632, Severity: 20, State: 2
Attempt to move memory with an incorrect length of 28580. Maximum allowed length is 16384.

• Error "Current process infected with Signal 11" (or Signal 10) with a stack trace that includes routines sendtext() and may include txcomp__getplaintxt() or txcomp__cleanup().

• Other Signal 11 (or Signal 10) with stack traces may occur indicating memory corruption due to earlier memory corruption failures.

• The ASE server may crash reporting a memory corruption stack trace with a SPINLOCK violation.

• BCP OUT of data from a user table with text/image column(s) may hang.

• Error 7173:

Error: 7173, Severity: 18, State: 6
server Internal error while decompressing the text value on page 622, dbid 1, error code 4 (TX_ZLIB_DAT_ERR).
Please contact Sybase Technical Support.

• Msg 12918 when executing DBCC CHECKTABLE or CHECKDB against table(s) containing text/image columns.

Msg 12918, Level 16, State 2:
Flags (0x48b) in Text/Image/Unitext Page Status Area on text page 8388935 (partition id 592005140) does not match the attribute of text page
chain starting from page 8331274. Run DBCC REBUILD_TEXT to fix it.

• Msg 100030, hard fault 'page format error,'  in the DBCC CHECKSTORAGE output indicating a page with text/image data.

• Other processes may subsequently encounter a variety of other problems due to memory corruption that may occur during item 2 above.

• SAP Adaptive Server Enterprise (ASE) 15.7
• SAP Adaptive Server Enterprise (ASE) 16.0 

compression, TIPSA, TX_TIPSA_COMPRESSED, skip_ncindex, skip_tables_with_no_text, SIGSEGV, segmentation, fault, segfault, access, violation, SIGBUS, 693329, CR693329, 744986, CR744986 , 787670, CR787670, compression, bit unused, status bit, TIPSA, internal structure, text pages, dbcc page, text stat bit unused, PG_TEXT, PG_FIRST_TEXT_PAGE, -T7167 , KBA , compress , BC-SYB-ASE , Sybase ASE Database Platform (non Business Suite) , Bug Filed