search

maxsatula / ocp

Oracle Copy utility
GNU General Public License v2.0
13 stars 2 forks source link

Downloaded file corruption #13

Closed maxsatula closed 8 years ago

maxsatula commented 10 years ago

Downloaded file is 1 byte shorter than original and the data is different starting from position ORA_RAW_BUFFER_SIZE

maxsatula commented 10 years ago

Seems to be an Oracle bug, not a program bug. First portion is ok. Second read by UTL_FILE.GET_RAW looses a first byte of the source stream.

Happens only when the SERVER=SHARED. When SERVER=DEDICATED, all is ok.

Possible solutions: 1) Do nothing, document that ocp works with DEDICATED servers only. 2) Check server type (v$session or USERENV if possible) and apply a workaround if necessary (read first portion, close file, reopen file, read first portion less one byte and throw result away, then continue as usual) 3) Try to open file and reproduce the bug with a smaller buffer size, then close the file and start copy with knowledge whether workaround is needed. If the file is filled with the same byte, that does not work. Need to read entire file and check whether file size reduced by 1.

maxsatula commented 8 years ago

Using of SHARED server connection is impractical anyway. Even if there was not corruption, that might be extremely slow.