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Bug#11759519 - INFINITE HANG WITH 100% CPU USAGE WITH LOAD DATA

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LOCAL AND IMPORT ERRORS

Description:
-----------
This bug happens due to the fact that current algorithm is designed
that in the case of LOCAL load of data, in case of the error, the
remaining part of the file is read in order to return the proper
error message to the client side.

But, the problem with current implementation is that data stream
for the client side is cleared only in the case where line delimiters
exist, which is not a case with, for example fixed width
fields.

Fix:
----
Ported patch provided by Sinisa Milivojevic n bug report for this
issue to 5.5+ versions.

As part of this patch code is changed to clear the data stream
by calling new member function "READ_INFO::skip_data_till_eof".
This commit is contained in:
Praveenkumar Hulakund
2014-03-19 12:30:30 +05:30
parent c8b8d00947
commit 95e99e1263
3 changed files with 46 additions and 6 deletions
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12
mysql-test/r/loaddata.result
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@ -520,3 +520,15 @@ LOAD DATA INFILE 'MYSQLTEST_VARDIR/tmp/bug11735141.txt' INTO TABLE t1;
ERROR 22003: Cannot get geometry object from data you send to the GEOMETRY field
drop table t1;
End of 5.1 tests
#
# Bug#11759519 INFINITE HANG WITH 100% CPU USAGE WITH LOAD DATA LOCAL AND IMPORT ERRORS
#
SET @old_mode= @@sql_mode;
CREATE TABLE t1 (fld1 INT);
SET sql_mode='strict_all_tables';
# Without fix, load data hangs forever.
LOAD DATA LOCAL INFILE 'MYSQLTEST_VARDIR/mysql' REPLACE INTO TABLE t1
FIELDS TERMINATED BY 't' LINES TERMINATED BY '';
Got one of the listed errors
SET @@sql_mode= @old_mode;
DROP TABLE t1;