Incorrect position calculation in PositionedStoreStream with read(byte[],...)
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Key: DERBY-3735
URL: https://issues.apache.org/jira/browse/DERBY-3735
Project: Derby
Issue Type: Bug
Components: JDBC, Store
Affects Versions: 10.4.1.3, 10.3.1.4, 10.5.0.0
Reporter: Kristian Waagan
Assignee: Kristian Waagan
Priority: Minor
A bug in the methods 'read(byte[])' and 'read(byte[],int,int)' in
PositionedStoreStream can cause the position variable to be set to an incorrect
value.
The bug is only triggered if one of the two read methods is invoked after EOF
of the underlying stream has been reached.
If the bug is triggered, the position will be decreased by one because the
underlying stream returns -1. Subsequent reads will further decrease the
position. This can cause EOF-exceptions (during repositioning) or incorrect
data being returned in subsequent calls.
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