Marshall Schor created UIMA-5250:
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Summary: uv3 copy-on-write needs reset for moveToFirst/Last/fs
Key: UIMA-5250
URL: https://issues.apache.org/jira/browse/UIMA-5250
Project: UIMA
Issue Type: Bug
Components: Core Java Framework
Reporter: Marshall Schor
Assignee: Marshall Schor
Fix For: 3.0.0SDKexp
In v2, iterators may throw ConcurrentModificationException when an index is
updated while it's being iterated over.
In v3, this is avoided by doing the minimal copy-on-write operation to the
affected portion of the indexes.
There is an exception in v2 to this: 3 operations "reset" the modification
tracking state to the current state of the index. These operations are those
that move the interator to a known position. There are three API calls that do
this: moveToFirst, moveToLast, and moveTo (meaning move to a position indicated
by the passed-in FeatureStructure).
The corresponding operation for v3 has to be: for these three operations, if a
copy-on-write operation has occurred, to reset the iterator to a fresh view of
the current state of the underlying index (discarding the copy-on write
version).
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