ERROR 2021-08-08 23:58:37,381 [stardog-user-7] com.complexible.stardog.QueryManager:exceptionTriggered(510): Error during execution of the query%nSELECT ?member ?name {
   GRAPH <virtual://music> {
      ?band a :Band ;
            :name "The Beatles" .
      ?member :member ?band ;
            :name ?name .
   }
}%nwith query plan prefix : <http://api.stardog.com/>
prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#>
prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#>
prefix xsd: <http://www.w3.org/2001/XMLSchema#>
prefix owl: <http://www.w3.org/2002/07/owl#>
prefix stardog: <tag:stardog:api:>

VirtualGraphSql<virtual://music> [#1] {
+─ RelNode=
+─    LogicalProject(artist=[$0], name=[$3])
+─      LogicalJoin(condition=[AND(=($1, $6), =($7, 'The Beatles'), =($9, 2))], joinType=[inner])
+─        LogicalJoin(condition=[AND(=($0, $2), IS NOT NULL($3))], joinType=[inner])
+─          JdbcTableScan(table=[[TEST, membership]])
+─          JdbcTableScan(table=[[TEST, artist]])
+─        JdbcTableScan(table=[[TEST, artist]])
+─ Query=
+─    SELECT `membership`.`artist`, `artist`.`name`
+─    FROM `TEST`.`membership`
+─    INNER JOIN `TEST`.`artist` ON `membership`.`artist` = `artist`.`id` AND `artist`.`name` IS NOT NULL
+─    INNER JOIN `TEST`.`artist` AS `artist0` ON `membership`.`band` = `artist0`.`id` AND `artist0`.`name` = 'The Beatles' AND `artist0`.`type` = 2
+─ Vars=
+─    ?member <- TEMPLATE(http://stardog.com/tutorial/Artist{artist/0})
+─    ?name <- COLUMN($1)^^xsd:string
}
against database music
com.complexible.stardog.plan.eval.operator.OperatorException: Unable to execute virtual graph query. SQL string: SELECT `membership`.`artist`, `artist`.`name`
FROM `TEST`.`membership`
INNER JOIN `TEST`.`artist` ON `membership`.`artist` = `artist`.`id` AND `artist`.`name` IS NOT NULL
INNER JOIN `TEST`.`artist` AS `artist0` ON `membership`.`band` = `artist0`.`id` AND `artist0`.`name` = 'The Beatles' AND `artist0`.`type` = 2
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:110) ~[stardog-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:29) ~[stardog-7.6.4.jar:?]
	at com.complexible.common.collect.AbstractSkippingIterator.tryToComputeNext(AbstractSkippingIterator.java:147) ~[stardog-utils-common-7.6.4.jar:?]
	at com.complexible.common.collect.AbstractSkippingIterator.hasNext(AbstractSkippingIterator.java:134) ~[stardog-utils-common-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.util.AutoCloseOperator.computeNext(AutoCloseOperator.java:138) ~[stardog-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.util.AutoCloseOperator.computeNext(AutoCloseOperator.java:28) ~[stardog-7.6.4.jar:?]
	at com.complexible.common.collect.AbstractSkippingIterator.tryToComputeNext(AbstractSkippingIterator.java:147) ~[stardog-utils-common-7.6.4.jar:?]
	at com.complexible.common.collect.AbstractSkippingIterator.hasNext(AbstractSkippingIterator.java:134) ~[stardog-utils-common-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.util.OpBasedBindingSetIteration.computeNext(OpBasedBindingSetIteration.java:116) ~[stardog-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.util.OpBasedBindingSetIteration.computeNext(OpBasedBindingSetIteration.java:37) ~[stardog-7.6.4.jar:?]
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
	at com.complexible.common.base.CloseableIterator$2.computeNext(CloseableIterator.java:84) ~[stardog-utils-common-7.6.4.jar:?]
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
	at com.complexible.common.rdf.query.IteratorAsTupleQueryResult.computeNext(IteratorAsTupleQueryResult.java:98) ~[stardog-utils-rdf-7.6.4.jar:?]
	at com.complexible.common.rdf.query.IteratorAsTupleQueryResult.computeNext(IteratorAsTupleQueryResult.java:24) ~[stardog-utils-rdf-7.6.4.jar:?]
	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
	at com.stardog.stark.query.ClosingSpliterator.forEachRemaining(ClosingSpliterator.java:37) ~[stardog-stark-query-api-7.6.4.jar:?]
	at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647) ~[?:1.8.0_292]
	at com.stardog.stark.query.io.QueryResultWriters.write(QueryResultWriters.java:140) ~[stardog-stark-query-io-7.6.4.jar:?]
	at com.stardog.stark.query.io.QueryResultWriters.write(QueryResultWriters.java:126) ~[stardog-stark-query-io-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.ProtocolUtils.writeTupleResponse(ProtocolUtils.java:728) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:620) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:589) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:547) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.SPARQLProtocol.executeQuery(SPARQLProtocol.java:227) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.complexible.stardog.protocols.http.server.SPARQLProtocol.get(SPARQLProtocol.java:129) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192) ~[stardog-protocols-http-server-7.6.4.jar:?]
	at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) [shiro-core-1.7.1.jar:1.7.1]
	at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) [shiro-core-1.7.1.jar:1.7.1]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_292]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_292]
	at java.lang.Thread.run(Thread.java:748) [?:1.8.0_292]
Caused by: com.complexible.stardog.StardogException: Unable to execute virtual graph query. SQL string: SELECT `membership`.`artist`, `artist`.`name`
FROM `TEST`.`membership`
INNER JOIN `TEST`.`artist` ON `membership`.`artist` = `artist`.`id` AND `artist`.`name` IS NOT NULL
INNER JOIN `TEST`.`artist` AS `artist0` ON `membership`.`band` = `artist0`.`id` AND `artist0`.`name` = 'The Beatles' AND `artist0`.`type` = 2
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor.lambda$execute$0(RdbmsRelExecutor.java:59) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor.execute(RdbmsRelExecutor.java:77) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:208) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more
Caused by: java.sql.SQLNonTransientConnectionException: No operations allowed after connection closed.
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:73) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.ConnectionImpl.createStatement(ConnectionImpl.java:1099) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
	at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:75) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-9.0.43.jar:?]
	at com.sun.proxy.$Proxy72.createStatement(Unknown Source) ~[?:?]
	at com.complexible.stardog.virtual.vega.dialect.VegaMysqlDialect.createJdbcStatement(VegaMysqlDialect.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor.execute(RdbmsRelExecutor.java:64) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:208) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more
Caused by: com.mysql.cj.exceptions.ConnectionIsClosedException: No operations allowed after connection closed.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_292]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_292]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.NativeSession.checkClosed(NativeSession.java:1171) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.ConnectionImpl.checkClosed(ConnectionImpl.java:573) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.ConnectionImpl.createStatement(ConnectionImpl.java) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
	at org.apache.tomcat.jdbc.pool.ProxyConnection.invoke(ProxyConnection.java:126) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.interceptor.AbstractCreateStatementInterceptor.invoke(AbstractCreateStatementInterceptor.java:75) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.JdbcInterceptor.invoke(JdbcInterceptor.java:108) ~[tomcat-jdbc-9.0.43.jar:?]
	at org.apache.tomcat.jdbc.pool.DisposableConnectionFacade.invoke(DisposableConnectionFacade.java:81) ~[tomcat-jdbc-9.0.43.jar:?]
	at com.sun.proxy.$Proxy72.createStatement(Unknown Source) ~[?:?]
	at com.complexible.stardog.virtual.vega.dialect.VegaMysqlDialect.createJdbcStatement(VegaMysqlDialect.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor.execute(RdbmsRelExecutor.java:64) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:208) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: The last packet successfully received from the server was 419,637 milliseconds ago. The last packet sent successfully to the server was 419,845 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) ~[?:1.8.0_292]
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423) ~[?:1.8.0_292]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:546) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:951) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:897) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.NativeSession.execSQL(NativeSession.java:1073) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeSimpleNonQuery(StatementImpl.java:1237) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.setupStreamingTimeout(StatementImpl.java:630) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1122) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
	at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-9.0.43.jar:?]
	at com.sun.proxy.$Proxy230.executeQuery(Unknown Source) ~[?:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor$1.getResult(RdbmsRelExecutor.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:237) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more
Caused by: javax.net.ssl.SSLException: Connection reset
	at sun.security.ssl.Alert.createSSLException(Alert.java:127) ~[?:1.8.0_292]
	at sun.security.ssl.TransportContext.fatal(TransportContext.java:324) ~[?:1.8.0_292]
	at sun.security.ssl.TransportContext.fatal(TransportContext.java:267) ~[?:1.8.0_292]
	at sun.security.ssl.TransportContext.fatal(TransportContext.java:262) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1554) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl.access$400(SSLSocketImpl.java:73) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:964) ~[?:1.8.0_292]
	at java.io.FilterInputStream.read(FilterInputStream.java:133) ~[?:1.8.0_292]
	at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:540) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:951) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:897) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.NativeSession.execSQL(NativeSession.java:1073) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeSimpleNonQuery(StatementImpl.java:1237) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.setupStreamingTimeout(StatementImpl.java:630) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1122) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
	at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-9.0.43.jar:?]
	at com.sun.proxy.$Proxy230.executeQuery(Unknown Source) ~[?:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor$1.getResult(RdbmsRelExecutor.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:237) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more
	Suppressed: java.net.SocketException: Broken pipe (Write failed)
		at java.net.SocketOutputStream.socketWrite0(Native Method) ~[?:1.8.0_292]
		at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111) ~[?:1.8.0_292]
		at java.net.SocketOutputStream.write(SocketOutputStream.java:155) ~[?:1.8.0_292]
		at sun.security.ssl.SSLSocketOutputRecord.encodeAlert(SSLSocketOutputRecord.java:81) ~[?:1.8.0_292]
		at sun.security.ssl.TransportContext.fatal(TransportContext.java:355) ~[?:1.8.0_292]
		at sun.security.ssl.TransportContext.fatal(TransportContext.java:267) ~[?:1.8.0_292]
		at sun.security.ssl.TransportContext.fatal(TransportContext.java:262) ~[?:1.8.0_292]
		at sun.security.ssl.SSLSocketImpl.handleException(SSLSocketImpl.java:1554) ~[?:1.8.0_292]
		at sun.security.ssl.SSLSocketImpl.access$400(SSLSocketImpl.java:73) ~[?:1.8.0_292]
		at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:964) ~[?:1.8.0_292]
		at java.io.FilterInputStream.read(FilterInputStream.java:133) ~[?:1.8.0_292]
		at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:540) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:951) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:897) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.NativeSession.execSQL(NativeSession.java:1073) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.jdbc.StatementImpl.executeSimpleNonQuery(StatementImpl.java:1237) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.jdbc.StatementImpl.setupStreamingTimeout(StatementImpl.java:630) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1122) ~[mysql-connector-java-8.0.25.jar:8.0.25]
		at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
		at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
		at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
		at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
		at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-9.0.43.jar:?]
		at com.sun.proxy.$Proxy230.executeQuery(Unknown Source) ~[?:?]
		at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor$1.getResult(RdbmsRelExecutor.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
		at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:237) ~[stardog-virtual-core-7.6.4.jar:?]
		at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:29) ~[stardog-7.6.4.jar:?]
		at com.complexible.common.collect.AbstractSkippingIterator.tryToComputeNext(AbstractSkippingIterator.java:147) ~[stardog-utils-common-7.6.4.jar:?]
		at com.complexible.common.collect.AbstractSkippingIterator.hasNext(AbstractSkippingIterator.java:134) ~[stardog-utils-common-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.util.AutoCloseOperator.computeNext(AutoCloseOperator.java:138) ~[stardog-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.util.AutoCloseOperator.computeNext(AutoCloseOperator.java:28) ~[stardog-7.6.4.jar:?]
		at com.complexible.common.collect.AbstractSkippingIterator.tryToComputeNext(AbstractSkippingIterator.java:147) ~[stardog-utils-common-7.6.4.jar:?]
		at com.complexible.common.collect.AbstractSkippingIterator.hasNext(AbstractSkippingIterator.java:134) ~[stardog-utils-common-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.util.OpBasedBindingSetIteration.computeNext(OpBasedBindingSetIteration.java:116) ~[stardog-7.6.4.jar:?]
		at com.complexible.stardog.plan.eval.operator.util.OpBasedBindingSetIteration.computeNext(OpBasedBindingSetIteration.java:37) ~[stardog-7.6.4.jar:?]
		at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
		at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
		at com.complexible.common.base.CloseableIterator$2.computeNext(CloseableIterator.java:84) ~[stardog-utils-common-7.6.4.jar:?]
		at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
		at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
		at com.complexible.common.rdf.query.IteratorAsTupleQueryResult.computeNext(IteratorAsTupleQueryResult.java:98) ~[stardog-utils-rdf-7.6.4.jar:?]
		at com.complexible.common.rdf.query.IteratorAsTupleQueryResult.computeNext(IteratorAsTupleQueryResult.java:24) ~[stardog-utils-rdf-7.6.4.jar:?]
		at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141) ~[guava-30.1.1-jre.jar:?]
		at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136) ~[guava-30.1.1-jre.jar:?]
		at com.stardog.stark.query.ClosingSpliterator.forEachRemaining(ClosingSpliterator.java:37) ~[stardog-stark-query-api-7.6.4.jar:?]
		at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:647) ~[?:1.8.0_292]
		at com.stardog.stark.query.io.QueryResultWriters.write(QueryResultWriters.java:140) ~[stardog-stark-query-io-7.6.4.jar:?]
		at com.stardog.stark.query.io.QueryResultWriters.write(QueryResultWriters.java:126) ~[stardog-stark-query-io-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.ProtocolUtils.writeTupleResponse(ProtocolUtils.java:728) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:620) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:589) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.ProtocolUtils.executeReadQuery(ProtocolUtils.java:547) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.SPARQLProtocol.executeQuery(SPARQLProtocol.java:227) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.complexible.stardog.protocols.http.server.SPARQLProtocol.get(SPARQLProtocol.java:129) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at com.stardog.http.server.undertow.jaxrs.ExtractRoutes.lambda$handleIt$5(ExtractRoutes.java:192) ~[stardog-protocols-http-server-7.6.4.jar:?]
		at org.apache.shiro.subject.support.SubjectRunnable.doRun(SubjectRunnable.java:120) [shiro-core-1.7.1.jar:1.7.1]
		at org.apache.shiro.subject.support.SubjectRunnable.run(SubjectRunnable.java:108) [shiro-core-1.7.1.jar:1.7.1]
		at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_292]
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_292]
		at java.lang.Thread.run(Thread.java:748) [?:1.8.0_292]
Caused by: java.net.SocketException: Connection reset
	at java.net.SocketInputStream.read(SocketInputStream.java:210) ~[?:1.8.0_292]
	at java.net.SocketInputStream.read(SocketInputStream.java:141) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:457) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketInputRecord.bytesInCompletePacket(SSLSocketInputRecord.java:68) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1332) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl.access$300(SSLSocketImpl.java:73) ~[?:1.8.0_292]
	at sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:948) ~[?:1.8.0_292]
	at java.io.FilterInputStream.read(FilterInputStream.java:133) ~[?:1.8.0_292]
	at com.mysql.cj.protocol.FullReadInputStream.readFully(FullReadInputStream.java:64) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:63) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.SimplePacketReader.readHeader(SimplePacketReader.java:45) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:52) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.TimeTrackingPacketReader.readHeader(TimeTrackingPacketReader.java:41) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:54) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.MultiPacketReader.readHeader(MultiPacketReader.java:44) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.readMessage(NativeProtocol.java:540) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.checkErrorMessage(NativeProtocol.java:710) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendCommand(NativeProtocol.java:649) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryPacket(NativeProtocol.java:951) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.protocol.a.NativeProtocol.sendQueryString(NativeProtocol.java:897) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.NativeSession.execSQL(NativeSession.java:1073) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeSimpleNonQuery(StatementImpl.java:1237) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.setupStreamingTimeout(StatementImpl.java:630) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at com.mysql.cj.jdbc.StatementImpl.executeQuery(StatementImpl.java:1122) ~[mysql-connector-java-8.0.25.jar:8.0.25]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_292]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_292]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_292]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_292]
	at org.apache.tomcat.jdbc.pool.StatementFacade$StatementProxy.invoke(StatementFacade.java:114) ~[tomcat-jdbc-9.0.43.jar:?]
	at com.sun.proxy.$Proxy230.executeQuery(Unknown Source) ~[?:?]
	at com.complexible.stardog.virtual.vega.rdbms.RdbmsRelExecutor$1.getResult(RdbmsRelExecutor.java:96) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.execute(VirtualServiceQuery.java:237) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.virtual.vega.VirtualServiceQuery.evaluate(VirtualServiceQuery.java:259) ~[stardog-virtual-core-7.6.4.jar:?]
	at com.complexible.stardog.plan.eval.operator.impl.ServiceOperatorImpl.computeNext(ServiceOperatorImpl.java:96) ~[stardog-7.6.4.jar:?]
	... 34 more