Steve Lawrence created DAFFODIL-2455:
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Summary: Large CSV file causes "Attempting to backtrack too far"
exception
Key: DAFFODIL-2455
URL: https://issues.apache.org/jira/browse/DAFFODIL-2455
Project: Daffodil
Issue Type: Bug
Reporter: Steve Lawrence
Assignee: Steve Lawrence
Fix For: 3.1.0
A user reports that they have an ~800MB CSV file and a schema to parse that
file that looks something like this:
{code:xml}
<xs:element name="file">
<xs:complexType>
<xs:sequence dfdl:separator="%NL;" dfdl:separatorPosition="postfix">
<xs:element name="row" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence dfdl:separator=",">
<xs:element name="field1" type="xs:string"/>
<xs:element name="field2" type="xs:string"/>
...
<xs:element name="fieldN" type="xs:string"/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
{code}
Parsing this large file fails with the exception:
{quote}[error] Runtime Schema Definition Error: Attempted to backtrack too far:
Attempted to backtrack to byte 268427263, which exceeds maximum backtrack
length of 268435456
{quote}
This schema does not require any backtracking, so shouldn't be hitting this
issue.
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