if (err != DB_SUCCESS && err != DB_CORRUPTION && xtrabackup_backup) {

                /* allow corrupted first page for xtrabackup, it could be just

                zero-filled page, which we restore from redo log later */

                die("Failed to not validate first page of the file %s, error %d",name, (int)err);

        }

call mtr.add_suppression("InnoDB: New log files created");

let $basedir=$MYSQLTEST_VARDIR/tmp/backup;

let $incremental_dir=$MYSQLTEST_VARDIR/tmp/backup_inc1;

CREATE TABLE t(a varchar(40) PRIMARY KEY, b varchar(40), c varchar(40), d varchar(40), index(b,c,d)) ENGINE INNODB;

set global innodb_log_checkpoint_now = true;

let $backuplog=$MYSQLTEST_VARDIR/tmp/backup.log;

echo # Create full backup , modify table, then create incremental/differential backup;

--disable_result_log

--echo # dbug execute makes checksum mismatch while reading page 0 of table t.

exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf  --backup --target-dir=$basedir --dbug=+d,page_intermittent_checksum_mismatch >$backuplog;

--enable_result_log

--disable_result_log

echo # Prepare full backup, apply incremental one;

exec $XTRABACKUP --prepare --verbose --apply-log-only --target-dir=$basedir;

echo # Restore and check results;

let $targetdir=$basedir;

-- source include/restart_and_restore.inc

--enable_result_log

SELECT count(*) FROM t;

DROP TABLE t;

# Cleanup

rmdir $basedir;

diff --git a/storage/innobase/buf/buf0buf.cc b/storage/innobase/buf/buf0buf.cc

index 8dc2fd2..8f00c83 100644

--- a/storage/innobase/buf/buf0buf.cc

+++ b/storage/innobase/buf/buf0buf.cc

@@ -1103,6 +1103,17 @@ buf_page_is_corrupted(

                        if (srv_checksum_algorithm

                            == SRV_CHECKSUM_ALGORITHM_CRC32) {

+

+                               DBUG_EXECUTE_IF(

+                                       "page_intermittent_checksum_mismatch", {

+                                       static int page_counter;

+                                       if (page_counter++ == 4) {

+                                               fprintf(stderr, "mismatch\n");

+                                               checksum_field2++;

+                                       }

+                               });

+

+

                                crc32 = buf_page_check_crc32(read_buf,