Benjamin De Boe created UIMA-4899:
-------------------------------------
Summary: UIMACPP access violation when running in multiple threads
Key: UIMA-4899
URL: https://issues.apache.org/jira/browse/UIMA-4899
Project: UIMA
Issue Type: Bug
Components: C++ Framework
Affects Versions: 2.8.1SDK
Environment: Windows 10 64bit
Reporter: Benjamin De Boe
When running a bunch of threads accessing separate AE instances of the UIMACPP
DaveDetector in JNI mode, the process crashes with an access violation on the
call to "delete pInstance" in destructorJNI in jni/jni.cpp.
The code below should allow you to reproduce the issue and takes three
command-line arguments:
1: the full path to DaveDescriptor.xml
2: whether to use simple threads ("n") or separate processes ("y")
3: (optional, default 20) size of the CAS pool to use, which we found out has
an impact in reproducing the issue.
/*
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package com.intersys.uima.test;
import java.io.File;
import java.net.URL;
import java.net.URLClassLoader;
import org.apache.uima.UIMAFramework;
import org.apache.uima.analysis_engine.AnalysisEngine;
import org.apache.uima.cas.CAS;
import org.apache.uima.resource.ResourceSpecifier;
import org.apache.uima.util.CasCreationUtils;
import org.apache.uima.util.CasPool;
import org.apache.uima.util.Level;
import org.apache.uima.util.XMLInputSource;
/**
*
* @author bdeboe
*/
public class Standalone implements Runnable {
private String text;
private AnalysisEngine ae;
private CasPool pool;
public Standalone(String txt, AnalysisEngine ae, CasPool pool) {
this.text = txt;
this.ae = ae;
this.pool = pool;
}
public static void main(String[] args) throws Exception {
String descPath = ((args != null) && (args.length > 0)) ? args[0] :
"C:\\InterSystems\\UIMA\\bin\\DaveDetector.xml";
if ((args != null) && (args.length > 1) && (args[1].charAt(0) == 'y')) {
async(descPath);
return;
}
int casPoolSize = ((args != null) && (args.length > 2)) ?
Integer.valueOf(args[2]) : 20;
XMLInputSource in = new XMLInputSource(descPath);
ResourceSpecifier specifier
= UIMAFramework.getXMLParser().parseResourceSpecifier(in);
AnalysisEngine ae = UIMAFramework.produceAnalysisEngine(specifier);
CasPool pool = (casPoolSize > 0) ? new CasPool(casPoolSize, ae) : null;
String loremIpsum = "Lorem ipsum dolor sit amet, consectetur adipiscing
elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut
enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip
ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate
velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat
cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est
laborum.";
for (int i = 0; i < 25; i++) {
Standalone task = new Standalone(loremIpsum,
UIMAFramework.produceAnalysisEngine(specifier), (casPoolSize > 0) ? pool :
null);
Thread t = new Thread(task);
t.start();
}
}
public static int async(String descriptor) throws Exception {
String javaHome = System.getProperty("java.home");
String javaBin = javaHome
+ File.separator + "bin"
+ File.separator + "java";
//String classpath = System.getProperty("java.class.path");
URL[] urls = ((URLClassLoader)
Thread.currentThread().getContextClassLoader()).getURLs();
StringBuilder classPath = new StringBuilder();
for (URL url : urls) {
classPath.append(url.getPath()).append(";");
}
System.out.println(javaBin.concat(" -cp
").concat(classPath.toString()).concat("
").concat(Standalone.class.getCanonicalName()).concat(" ").concat(descriptor));
ProcessBuilder builder = new ProcessBuilder(
javaBin, "-cp", classPath.toString(),
Standalone.class.getCanonicalName(), descriptor);
builder.redirectErrorStream(true);
builder.redirectOutput(ProcessBuilder.Redirect.INHERIT);
Process[] processes = new Process[4];
processes[0] = builder.start();
processes[1] = builder.start();
processes[2] = builder.start();
processes[3] = builder.start();
int done = 0;
do {
Thread.sleep(1000);
done = 0;
for (int i = 0; i < 4; i++) {
if (!processes[i].isAlive()) {
done++;
}
}
System.out.println(String.valueOf(done).concat(" processes done"));
} while (done < 4);
return processes[3].exitValue();
}
@Override
public void run() {
CAS cas = null;
try {
if (pool != null) {
cas = pool.getCas();
} else {
cas =
CasCreationUtils.createCas(ae.getAnalysisEngineMetaData());
}
UIMAFramework.getLogger().log(Level.WARNING, "created CAS in thread
".concat(String.valueOf(Thread.currentThread().getId())));
cas.setDocumentText(text);
ae.process(cas);
System.out.println("Done processing text");
} catch (Exception e) {
e.printStackTrace();
} finally {
if (pool != null) pool.releaseCas(cas);
}
}
}
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