Comments (3)
Some exceptions raised by Blazegraph. It is not killed...yet...but it is not responding to queries...
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:610)
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:539)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.util.concurrent.ExecutionException: org.openrdf.query.TupleQueryResultHandlerException: org.eclipse.jetty.io.EofException
at java.util.concurrent.FutureTask.report(FutureTask.java:122)
at java.util.concurrent.FutureTask.get(FutureTask.java:192)
at com.bigdata.rdf.sail.webapp.QueryServlet$SparqlQueryTask.call(QueryServlet.java:864)
at com.bigdata.rdf.sail.webapp.QueryServlet$SparqlQueryTask.call(QueryServlet.java:670)
at com.bigdata.rdf.task.ApiTaskForIndexManager.call(ApiTaskForIndexManager.java:68)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more
Caused by: org.openrdf.query.TupleQueryResultHandlerException: org.eclipse.jetty.io.EofException
at com.bigdata.rdf.rio.json.SPARQLJSONWriterBase.endQueryResult(SPARQLJSONWriterBase.java:238)
at com.bigdata.rdf.rio.json.BigdataSPARQLResultsJSONWriter.endQueryResult(BigdataSPARQLResultsJSONWriter.java:36)
at org.openrdf.query.QueryResults.report(QueryResults.java:163)
at org.openrdf.repository.sail.SailTupleQuery.evaluate(SailTupleQuery.java:76)
at com.bigdata.rdf.sail.webapp.BigdataRDFContext$TupleQueryTask.doQuery(BigdataRDFContext.java:1713)
at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.innerCall(BigdataRDFContext.java:1569)
at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:1534)
at com.bigdata.rdf.sail.webapp.BigdataRDFContext$AbstractQueryTask.call(BigdataRDFContext.java:747)
... 4 more
Caused by: org.eclipse.jetty.io.EofException
at org.eclipse.jetty.io.ChannelEndPoint.flush(ChannelEndPoint.java:192)
at org.eclipse.jetty.io.WriteFlusher.write(WriteFlusher.java:337)
at org.eclipse.jetty.io.AbstractEndPoint.write(AbstractEndPoint.java:128)
at org.eclipse.jetty.server.HttpConnection$SendCallback.process(HttpConnection.java:646)
at org.eclipse.jetty.util.IteratingCallback.processIterations(IteratingCallback.java:233)
at org.eclipse.jetty.util.IteratingCallback.iterate(IteratingCallback.java:193)
at org.eclipse.jetty.server.HttpConnection.send(HttpConnection.java:457)
at org.eclipse.jetty.server.HttpChannel.sendResponse(HttpChannel.java:769)
at org.eclipse.jetty.server.HttpChannel.write(HttpChannel.java:802)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:139)
at org.eclipse.jetty.server.HttpOutput.write(HttpOutput.java:132)
at org.eclipse.jetty.server.HttpOutput.flush(HttpOutput.java:234)
at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297)
at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
at com.fasterxml.jackson.core.json.WriterBasedJsonGenerator.flush(WriterBasedJsonGenerator.java:860)
at com.bigdata.rdf.rio.json.SPARQLJSONWriterBase.endDocument(SPARQLJSONWriterBase.java:435)
at com.bigdata.rdf.rio.json.BigdataSPARQLResultsJSONWriter.endDocument(BigdataSPARQLResultsJSONWriter.java:36)
at com.bigdata.rdf.rio.json.SPARQLJSONWriterBase.endQueryResult(SPARQLJSONWriterBase.java:235)
... 11 more
Caused by: java.io.IOException: Broken pipe
at sun.nio.ch.FileDispatcherImpl.writev0(Native Method)
at sun.nio.ch.SocketDispatcher.writev(SocketDispatcher.java:51)
at sun.nio.ch.IOUtil.write(IOUtil.java:148)
at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:504)
at org.eclipse.jetty.io.ChannelEndPoint.flush(ChannelEndPoint.java:172)
from sepa.
About the last exception it seems that blazegraph was attempting to write a query result but the socket was closed. My guess is that or SEPA closed too early the socket or there was some unlucky connection issue between the accept of the request and the response.
In any case I think it should be reported to blazegraph, the database should be resilient to this kind of events.
from sepa.
Old issue, cannot be reproduced, closing...
from sepa.
Related Issues (20)
- Handling Queries Content-type HOT 1
- Subscriptions with OPTIONAL give wrong notifications HOT 2
- Provide a better error when wsClient is not initializated HOT 1
- SEPA 2nd run fails with default .jpar(s) HOT 3
- Include constrained devices
- Subscription duplication function HOT 5
- json-ld and other formats
- WebSocketGate does not validate webtoken HOT 3
- Improving EngineProperties saving HOT 2
- Forced binding doesn't use the default type HOT 1
- Reduce log during mvn tests
- Violation of Liskov substitution principle in JSAP file
- Bug on Client class HOT 1
- 404 WebSocket Upgrade Failure HOT 2
- Resolve dependabot issues HOT 1
- <help wanted> Problems about implementing delete function based on NGSI-LD HOT 1
- General Question about the SPARQL UPDATE using DELETE Function. HOT 3
- No notifications with the default graph (or in triple mode) HOT 2
- Sepa as web thing
- "LONG" Query POST to Virtuoso ends with "wrong path" while GET trunks the the query
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from sepa.