Hi,
Background
We execute some CONSTRUCT queries, using a block of code similar to the below code. We then convert it to a List<Statement> and return it.
try (Connection connection = getConnection()) {
GraphQueryResult result = null;
try {
connection.begin();
GraphQuery query = connection.graph(sparql).dataset(dataset);
result = query.execute();
connection.commit();
return new ArrayList<>(result.toGraph());
} catch (StardogException | QueryExecutionFailure e) {
log.error(e.toString());
throw new RuntimeException(e);
} finally {
if (result != null) {
try {
result.close();
} catch (QueryExecutionFailure e) {
log.error(e.toString());
}
}
}
}
Problem
Some of our CONSTRUCT queries return a large number of triples (e.g., around 500K triples). In these cases, this part of the code return new ArrayList<>(result.toGraph()); or more specifically result.toGraph() throws this error:
com.stardog.stark.query.QueryExecutionFailure: com.stardog.stark.io.InvalidRDF: Unexpected end of file [L23996]
com.stardog.stark.query.QueryExecutionFailure: com.stardog.stark.io.InvalidRDF: Unexpected end of file [L23996]
java.lang.RuntimeException: com.stardog.stark.query.QueryExecutionFailure: com.stardog.stark.io.InvalidRDF: Unexpected end of file [L23996]
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:38)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$5(NodeTestTask.java:143)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$7(NodeTestTask.java:129)
at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:127)
at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:126)
at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:84)
at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.submit(SameThreadHierarchicalTestExecutorService.java:32)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestExecutor.execute(HierarchicalTestExecutor.java:57)
at org.junit.platform.engine.support.hierarchical.HierarchicalTestEngine.execute(HierarchicalTestEngine.java:51)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:108)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:88)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.lambda$execute$0(EngineExecutionOrchestrator.java:54)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.withInterceptedStreams(EngineExecutionOrchestrator.java:67)
at org.junit.platform.launcher.core.EngineExecutionOrchestrator.execute(EngineExecutionOrchestrator.java:52)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:96)
at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:75)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.processAllTestClasses(JUnitPlatformTestClassProcessor.java:99)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor$CollectAllTestClassesExecutor.access$000(JUnitPlatformTestClassProcessor.java:79)
at org.gradle.api.internal.tasks.testing.junitplatform.JUnitPlatformTestClassProcessor.stop(JUnitPlatformTestClassProcessor.java:75)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.stop(SuiteTestClassProcessor.java:61)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:33)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy2.stop(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker$3.run(TestWorker.java:193)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.executeAndMaintainThreadName(TestWorker.java:129)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:100)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.execute(TestWorker.java:60)
at org.gradle.process.internal.worker.child.ActionExecutionWorker.execute(ActionExecutionWorker.java:56)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:133)
at org.gradle.process.internal.worker.child.SystemApplicationClassLoaderWorker.call(SystemApplicationClassLoaderWorker.java:71)
at worker.org.gradle.process.internal.worker.GradleWorkerMain.run(GradleWorkerMain.java:69)
at worker.org.gradle.process.internal.worker.GradleWorkerMain.main(GradleWorkerMain.java:74)
Caused by: com.stardog.stark.query.QueryExecutionFailure: com.stardog.stark.io.InvalidRDF: Unexpected end of file [L23996]
at app//com.complexible.stardog.protocols.http.client.HttpClientImpl.onParseError(HttpClientImpl.java:408)
at app//com.complexible.stardog.protocols.http.client.HttpClientImpl.lambda$graph$3(HttpClientImpl.java:344)
at app//com.complexible.common.rdf.query.IteratorAsGraphQueryResult.hasNext(IteratorAsGraphQueryResult.java:117)
at app//com.complexible.stardog.api.impl.AbstractConnection$OnCloseQueryResult.hasNext(AbstractConnection.java:785)
at app//com.complexible.stardog.api.impl.AbstractConnection$ConnectionQueryResult.hasNext(AbstractConnection.java:728)
at app//com.stardog.stark.query.ClosingSpliterator.forEachRemaining(ClosingSpliterator.java:37)
at java.base@11.0.18/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
at
... 91 more
Caused by: com.stardog.stark.io.InvalidRDF: Unexpected end of file [L23996]
at app//com.stardog.stark.io.ParserContext.error(ParserContext.java:247)
at app//com.stardog.stark.io.ParserContext.error(ParserContext.java:235)
at app//com.stardog.stark.io.turtle.TurtleParser.parseURI(TurtleParser.java:545)
at app//com.stardog.stark.io.turtle.TurtleParser.parseValue(TurtleParser.java:503)
at app//com.stardog.stark.io.turtle.TurtleParser.parseSubjectResource(TurtleParser.java:355)
at app//com.stardog.stark.io.turtle.TurtleParser.parseSubject(TurtleParser.java:350)
at app//com.stardog.stark.io.trig.TrigParser.parseTriples(TrigParser.java:236)
at app//com.stardog.stark.io.trig.TrigParser.parseGraph(TrigParser.java:164)
at app//com.stardog.stark.io.trig.TrigParser.parseStatement(TrigParser.java:72)
at app//com.stardog.stark.io.turtle.TurtleParser.parse(TurtleParser.java:97)
at app//com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:371)
at app//com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:329)
at app//com.complexible.common.rdf.rio.RDFStreamProcessor$ProducerThread.work(RDFStreamProcessor.java:917)
at app//com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:877)
at app//com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:866)
at java.base@11.0.18/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base@11.0.18/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base@11.0.18/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base@11.0.18/java.lang.Thread.run(Thread.java:829)
When we change result.toGraph() to something like
result = query.execute();
connection.commit();
List<Statement> listResults2 = new ArrayList<>();
AtomicInteger i = new AtomicInteger();
result.stream().forEach( statement -> {
System.out.println("i: " + i.get());
listResults2.add(statement);
i.getAndIncrement();
}
);
After adding around 199K triples to the list, it starts throwing these errors. (please ignore the i values if they're not sequential since we deleted some of them to make the text shorter to copy here)
i: 199059
at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1477)
at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:1066)
i: 199060
at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137)
at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153)
at org.apache.http.impl.io.SessionInputBufferImpl.read(SessionInputBufferImpl.java:205)
at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:188)
i: 199061
i: 199062
i: 199063
i: 199064
i: 199065
i: 199066
i: 199529
at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:135)
i: 199865
at java.base/java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:243)
at java.base/java.util.zip.InflaterInputStream.read(InflaterInputStream.java:159)
at java.base/java.util.zip.GZIPInputStream.read(GZIPInputStream.java:118)
at org.apache.http.client.entity.LazyDecompressingInputStream.read(LazyDecompressingInputStream.java:70)
at org.apache.commons.io.input.ProxyInputStream.read(ProxyInputStream.java:102)
at com.google.common.io.CountingInputStream.read(CountingInputStream.java:63)
i: 199866
at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
at java.base/java.io.BufferedInputStream.read1(BufferedInputStream.java:292)
at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:351)
i: 199867
i: 199868
i: 199869
i: 199870
i: 199871
i: 199872
i: 199873
i: 199874
at org.apache.commons.io.input.BOMInputStream.read(BOMInputStream.java:335)
at org.apache.commons.io.input.BOMInputStream.read(BOMInputStream.java:335)
i: 199875
i: 199876
at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
i: 199877
i: 199878
at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
i: 199879
i: 199880
at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
i: 199881
at java.base/java.io.InputStreamReader.read(InputStreamReader.java:181)
i: 199882
i: 199883
i: 199884
at java.base/java.io.BufferedReader.fill(BufferedReader.java:161)
i: 199885
i: 199886
at java.base/java.io.BufferedReader.read(BufferedReader.java:182)
i: 199887
i: 199888
at java.base/java.io.FilterReader.read(FilterReader.java:65)
i: 199889
i: 199890
at java.base/java.io.PushbackReader.read(PushbackReader.java:90)
i: 199891
i: 199892
at com.stardog.stark.io.IOParserContext.readCodePoint(IOParserContext.java:128)
i: 199893
i: 199894
at com.stardog.stark.io.turtle.TurtleParser.parseURI(TurtleParser.java:539)
i: 199895
i: 199896
i: 199897
at com.stardog.stark.io.turtle.TurtleParser.parseValue(TurtleParser.java:503)
i: 199898
i: 199899
at com.stardog.stark.io.turtle.TurtleParser.parseObject(TurtleParser.java:376)
i: 199900
i: 199901
at com.stardog.stark.io.turtle.TurtleParser.parseObjectList(TurtleParser.java:313)
i: 199902
i: 199903
at com.stardog.stark.io.turtle.TurtleParser.parsePredicateObjectList(TurtleParser.java:233)
i: 199904
i: 199905
at com.stardog.stark.io.trig.TrigParser.parseTriples(TrigParser.java:238)
i: 199906
i: 199907
at com.stardog.stark.io.trig.TrigParser.parseGraph(TrigParser.java:164)
i: 199908
i: 199909
at com.stardog.stark.io.trig.TrigParser.parseStatement(TrigParser.java:72)
i: 199910
i: 199911
at com.stardog.stark.io.turtle.TurtleParser.parse(TurtleParser.java:97)
i: 199912
i: 199913
at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:371)
i: 199914
i: 199915
at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:329)
i: 199916
i: 199917
i: 199918
at com.complexible.common.rdf.rio.RDFStreamProcessor$ProducerThread.work(RDFStreamProcessor.java:917)
i: 199919
i: 199920
i: 199921
at com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:877)
i: 199922
i: 199923
at com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:866)
i: 199924
i: 199925
i: 199926
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
i: 199927
i: 199991
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
i: 199992
i: 199993
i: 199994
i: 199995
i: 199996
i: 199997
i: 199998
i: 199999
and then
com.stardog.stark.query.QueryExecutionFailure: java.lang.RuntimeException: java.net.SocketException: Connection reset
com.stardog.stark.query.QueryExecutionFailure: java.lang.RuntimeException: java.net.SocketException: Connection reset
java.lang.RuntimeException: com.stardog.stark.query.QueryExecutionFailure: java.lang.RuntimeException: java.net.SocketException: Connection reset
Caused by: com.stardog.stark.query.QueryExecutionFailure: java.lang.RuntimeException: java.net.SocketException: Connection reset
at app//com.complexible.stardog.protocols.http.client.HttpClientImpl.onParseError(HttpClientImpl.java:408)
at app//com.complexible.stardog.protocols.http.client.HttpClientImpl.lambda$graph$3(HttpClientImpl.java:344)
at app//com.complexible.common.rdf.query.IteratorAsGraphQueryResult.hasNext(IteratorAsGraphQueryResult.java:117)
at app//com.complexible.stardog.api.impl.AbstractConnection$OnCloseQueryResult.hasNext(AbstractConnection.java:785)
at app//com.complexible.stardog.api.impl.AbstractConnection$ConnectionQueryResult.hasNext(AbstractConnection.java:728)
at app//com.stardog.stark.query.ClosingSpliterator.forEachRemaining(ClosingSpliterator.java:37)
at java.base@11.0.18/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:658)
at
... 91 more
Caused by: java.lang.RuntimeException: java.net.SocketException: Connection reset
at com.complexible.common.rdf.rio.RDFStreamProcessor$ConcurrentLoadManagerImpl$StmtIter.computeNext(RDFStreamProcessor.java:849)
at com.complexible.common.rdf.rio.RDFStreamProcessor$ConcurrentLoadManagerImpl$StmtIter.computeNext(RDFStreamProcessor.java:786)
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141)
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136)
at com.complexible.common.rdf.impl.StreamStatementIterator.computeNext(StreamStatementIterator.java:77)
at com.complexible.common.rdf.impl.StreamStatementIterator.computeNext(StreamStatementIterator.java:32)
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141)
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136)
at com.complexible.common.base.CloseableIterator$2.computeNext(CloseableIterator.java:84)
at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:141)
at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:136)
at com.complexible.common.rdf.query.IteratorAsGraphQueryResult.hasNext(IteratorAsGraphQueryResult.java:114)
... 96 more
Caused by: java.net.SocketException: Connection reset
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:186)
at java.base/java.net.SocketInputStream.read(SocketInputStream.java:140)
at java.base/sun.security.ssl.SSLSocketInputRecord.read(SSLSocketInputRecord.java:484)
at java.base/sun.security.ssl.SSLSocketInputRecord.readFully(SSLSocketInputRecord.java:467)
at java.base/sun.security.ssl.SSLSocketInputRecord.decodeInputRecord(SSLSocketInputRecord.java:243)
at java.base/sun.security.ssl.SSLSocketInputRecord.decode(SSLSocketInputRecord.java:181)
at java.base/sun.security.ssl.SSLTransport.decode(SSLTransport.java:111)
at java.base/sun.security.ssl.SSLSocketImpl.decode(SSLSocketImpl.java:1510)
at java.base/sun.security.ssl.SSLSocketImpl.readApplicationRecord(SSLSocketImpl.java:1477)
at java.base/sun.security.ssl.SSLSocketImpl$AppInputStream.read(SSLSocketImpl.java:1066)
at org.apache.http.impl.io.SessionInputBufferImpl.streamRead(SessionInputBufferImpl.java:137)
at org.apache.http.impl.io.SessionInputBufferImpl.fillBuffer(SessionInputBufferImpl.java:153)
at org.apache.http.impl.io.SessionInputBufferImpl.read(SessionInputBufferImpl.java:205)
at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:188)
at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:135)
at java.base/java.util.zip.InflaterInputStream.fill(InflaterInputStream.java:243)
at java.base/java.util.zip.InflaterInputStream.read(InflaterInputStream.java:159)
at java.base/java.util.zip.GZIPInputStream.read(GZIPInputStream.java:118)
at org.apache.http.client.entity.LazyDecompressingInputStream.read(LazyDecompressingInputStream.java:70)
at org.apache.commons.io.input.ProxyInputStream.read(ProxyInputStream.java:102)
at com.google.common.io.CountingInputStream.read(CountingInputStream.java:63)
at java.base/java.io.BufferedInputStream.fill(BufferedInputStream.java:252)
at java.base/java.io.BufferedInputStream.read1(BufferedInputStream.java:292)
at java.base/java.io.BufferedInputStream.read(BufferedInputStream.java:351)
at org.apache.commons.io.input.BOMInputStream.read(BOMInputStream.java:335)
at org.apache.commons.io.input.BOMInputStream.read(BOMInputStream.java:335)
at java.base/sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
at java.base/sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
at java.base/sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
at java.base/java.io.InputStreamReader.read(InputStreamReader.java:181)
at java.base/java.io.BufferedReader.fill(BufferedReader.java:161)
at java.base/java.io.BufferedReader.read(BufferedReader.java:182)
at java.base/java.io.FilterReader.read(FilterReader.java:65)
at java.base/java.io.PushbackReader.read(PushbackReader.java:90)
at com.stardog.stark.io.IOParserContext.readCodePoint(IOParserContext.java:128)
at com.stardog.stark.io.turtle.TurtleParser.parseURI(TurtleParser.java:539)
at com.stardog.stark.io.turtle.TurtleParser.parseValue(TurtleParser.java:503)
at com.stardog.stark.io.turtle.TurtleParser.parseObject(TurtleParser.java:376)
at com.stardog.stark.io.turtle.TurtleParser.parseObjectList(TurtleParser.java:313)
at com.stardog.stark.io.turtle.TurtleParser.parsePredicateObjectList(TurtleParser.java:233)
at com.stardog.stark.io.trig.TrigParser.parseTriples(TrigParser.java:238)
at com.stardog.stark.io.trig.TrigParser.parseGraph(TrigParser.java:164)
at com.stardog.stark.io.trig.TrigParser.parseStatement(TrigParser.java:72)
at com.stardog.stark.io.turtle.TurtleParser.parse(TurtleParser.java:97)
at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:371)
at com.complexible.common.rdf.rio.RDFStreamBuilder$RDFAbstractStream.parse(RDFStreamBuilder.java:329)
at com.complexible.common.rdf.rio.RDFStreamProcessor$ProducerThread.work(RDFStreamProcessor.java:917)
at com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:877)
at com.complexible.common.rdf.rio.RDFStreamProcessor$Worker.call(RDFStreamProcessor.java:866)
at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
at java.base/java.lang.Thread.run(Thread.java:829)
Questions
What's the best way to resolve the above errors?
Thank you!