[ACCUMULO-338] Combiners lose data when reading off of disk

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.4.0
• Assignee: Billie Rinaldi
• Reporter: John Vines
• Created: 20/Jan/12 18:54
• Updated: 27/Feb/13 02:11
• Resolved: 20/Jan/12 19:56

Description

There is a bug with Combiners in 1.4 resulting in bad data-

to recreate-
createtable test;
config -t test -s table.iterator.minc.vers=10
config -t test -s table.iterator.majc.vers=10
config -t test -s table.iterator.scan.vers=10
insert r f q 1
insert r f q 2
insert r f q 3
setiter -class org.apache.accumulo.core.iterators.user.SummingCombiner -scan -n summer -p 60 -t test
true

STRING
scan
flush
scan
deleteiter -t test -n summer -scan
scan

You will see all three values the first scan, 6 for the second scan, 4 for the third scan, and all three values for the 4th scan. In debug I saw teh values 2, 1, and 1 in that order in the Viterator.next method.