[JENA-2257] QueryExecHTTP#actualSendMode ignores query length causing HTTP 414

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Jena 4.3.2
• Fix Version/s: Jena 4.4.0
• Component/s: ARQ, SPARQL
• Assignee: Andy Seaborne
• Reporter: Jan Martin Keil
• Created: 20/Jan/22 12:52
• Updated: 02/Feb/22 19:31
• Resolved: 23/Jan/22 22:39

Description

QueryExecHTTP#actualSendMode(), called in QueryExecHTTP#query(String reqAcceptHeader), does not consider the length of the query. In case of long queries, this causes 414 Request-URI Too Long errors, even if sendMode==QuerySendMode.asGetWithLimitBody (default):

HttpException: 414 Request-URI Too Long
    at org.apache.jena.sparql.engine.http.QueryExceptionHTTP.rewrap(QueryExceptionHTTP.java:49)
    at org.apache.jena.sparql.exec.http.QueryExecHTTP.executeQuery(QueryExecHTTP.java:493)
    at org.apache.jena.sparql.exec.http.QueryExecHTTP.query(QueryExecHTTP.java:483)
    at org.apache.jena.sparql.exec.http.QueryExecHTTP.execRdfWorker(QueryExecHTTP.java:339)
    at org.apache.jena.sparql.exec.http.QueryExecHTTP.execGraph(QueryExecHTTP.java:287)
    at org.apache.jena.sparql.exec.http.QueryExecHTTP.construct(QueryExecHTTP.java:244)
    at org.apache.jena.sparql.exec.QueryExecutionAdapter.execConstruct(QueryExecutionAdapter.java:129)

Workarounds:

• QuerySendMode.systemDefault = QuerySendMode.asPost;
• QueryExecution.service(…).sendMode(QuerySendMode.asPost)

Issue Links

• links to: GitHub Pull Request #1171