Author: markt
Date: Thu Jan 30 09:17:13 2014
New Revision: 1562748
URL: http://svn.apache.org/r1562748
Log:
Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=56082
Fix thread safety issue in JULI's LogManager implementation
Modified:
tomcat/tc7.0.x/trunk/ (props changed)
tomcat/tc7.0.x/trunk/java/org/apache/juli/ClassLoaderLogManager.java
tomcat/tc7.0.x/trunk/test/org/apache/juli/TestClassLoaderLogManager.java
tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml
Propchange: tomcat/tc7.0.x/trunk/
------------------------------------------------------------------------------
Merged /tomcat/trunk:r1562742,1562746
Modified: tomcat/tc7.0.x/trunk/java/org/apache/juli/ClassLoaderLogManager.java
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/java/org/apache/juli/ClassLoaderLogManager.java?rev=1562748&r1=1562747&r2=1562748&view=diff
==============================================================================
--- tomcat/tc7.0.x/trunk/java/org/apache/juli/ClassLoaderLogManager.java
(original)
+++ tomcat/tc7.0.x/trunk/java/org/apache/juli/ClassLoaderLogManager.java Thu
Jan 30 09:17:13 2014
@@ -36,6 +36,7 @@ import java.util.Map;
import java.util.Properties;
import java.util.StringTokenizer;
import java.util.WeakHashMap;
+import java.util.concurrent.ConcurrentHashMap;
import java.util.logging.Handler;
import java.util.logging.Level;
import java.util.logging.LogManager;
@@ -704,7 +705,7 @@ public class ClassLoaderLogManager exten
protected static final class ClassLoaderLogInfo {
final LogNode rootNode;
- final Map<String, Logger> loggers = new HashMap<String, Logger>();
+ final Map<String, Logger> loggers = new ConcurrentHashMap<String,
Logger>();
final Map<String, Handler> handlers = new HashMap<String, Handler>();
final Properties props = new Properties();
Modified:
tomcat/tc7.0.x/trunk/test/org/apache/juli/TestClassLoaderLogManager.java
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/test/org/apache/juli/TestClassLoaderLogManager.java?rev=1562748&r1=1562747&r2=1562748&view=diff
==============================================================================
--- tomcat/tc7.0.x/trunk/test/org/apache/juli/TestClassLoaderLogManager.java
(original)
+++ tomcat/tc7.0.x/trunk/test/org/apache/juli/TestClassLoaderLogManager.java
Thu Jan 30 09:17:13 2014
@@ -14,11 +14,14 @@
* See the License for the specific language governing permissions and
* limitations under the License.
*/
-
package org.apache.juli;
-import static org.junit.Assert.assertEquals;
+import java.util.Collections;
+import java.util.Random;
+import java.util.logging.LogManager;
+import java.util.logging.Logger;
+import org.junit.Assert;
import org.junit.Test;
/**
@@ -29,33 +32,118 @@ public class TestClassLoaderLogManager {
@Test
public void testReplace() {
ClassLoaderLogManager logManager = new ClassLoaderLogManager();
- assertEquals("", logManager.replace(""));
- assertEquals("${", logManager.replace("${"));
- assertEquals("${undefinedproperty}",
+ Assert.assertEquals("", logManager.replace(""));
+ Assert.assertEquals("${", logManager.replace("${"));
+ Assert.assertEquals("${undefinedproperty}",
logManager.replace("${undefinedproperty}"));
- assertEquals(
+ Assert.assertEquals(
System.getProperty("line.separator")
+ System.getProperty("path.separator")
+ System.getProperty("file.separator"),
logManager
.replace("${line.separator}${path.separator}${file.separator}"));
- assertEquals(
+ Assert.assertEquals(
"foo" + System.getProperty("file.separator") + "bar"
+ System.getProperty("line.separator")
+ System.getProperty("path.separator") + "baz",
logManager
.replace("foo${file.separator}bar${line.separator}${path.separator}baz"));
// BZ 51249
- assertEquals(
+ Assert.assertEquals(
"%{file.separator}" + System.getProperty("file.separator"),
logManager.replace("%{file.separator}${file.separator}"));
- assertEquals(
+ Assert.assertEquals(
System.getProperty("file.separator") + "${undefinedproperty}"
+ System.getProperty("file.separator"),
logManager
.replace("${file.separator}${undefinedproperty}${file.separator}"));
- assertEquals("${}" + System.getProperty("path.separator"),
+ Assert.assertEquals("${}" + System.getProperty("path.separator"),
logManager.replace("${}${path.separator}"));
}
+ @Test
+ public void testBug56082() {
+ ClassLoaderLogManager logManager = new ClassLoaderLogManager();
+
+ LoggerCreateThread[] createThreads = new LoggerCreateThread[10];
+ for (int i = 0; i < createThreads.length; i ++) {
+ createThreads[i] = new LoggerCreateThread(logManager);
+ createThreads[i].setName("LoggerCreate-" + i);
+ createThreads[i].start();
+ }
+
+ LoggerListThread listThread = new LoggerListThread(logManager);
+ listThread.setName("LoggerList");
+ listThread.start();
+
+ int count = 0;
+ while (count < 4 && listThread.isAlive()) {
+ try {
+ Thread.sleep(500);
+ } catch (InterruptedException e) {
+ // Ignore
+ }
+ count++;
+ }
+
+ for (int i = 0; i < createThreads.length; i ++) {
+ createThreads[i].setRunning(false);
+ }
+
+ Assert.assertTrue(listThread.isRunning());
+ listThread.setRunning(false);
+ }
+
+ private static class LoggerCreateThread extends Thread {
+
+ private final LogManager logManager;
+ private volatile boolean running = true;
+
+ public LoggerCreateThread(LogManager logManager) {
+ this.logManager = logManager;
+ }
+
+ @Override
+ public void run() {
+ Random r = new Random();
+ while (running) {
+ Logger logger = Logger.getLogger("Bug56082-" +
r.nextInt(100000));
+ logManager.addLogger(logger);
+ }
+ }
+
+ public void setRunning(boolean running) {
+ this.running = running;
+ }
+ }
+
+ private static class LoggerListThread extends Thread {
+
+ private final LogManager logManager;
+ private volatile boolean running = true;
+
+ public LoggerListThread(LogManager logManager) {
+ this.logManager = logManager;
+ }
+
+ @Override
+ public void run() {
+ while (running) {
+ try {
+ Collections.list(logManager.getLoggerNames());
+ } catch (Exception e) {
+ e.printStackTrace();
+ running = false;
+ }
+ }
+ }
+
+ public boolean isRunning() {
+ return running;
+ }
+
+ public void setRunning(boolean running) {
+ this.running = running;
+ }
+ }
}
Modified: tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml
URL:
http://svn.apache.org/viewvc/tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml?rev=1562748&r1=1562747&r2=1562748&view=diff
==============================================================================
--- tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml (original)
+++ tomcat/tc7.0.x/trunk/webapps/docs/changelog.xml Thu Jan 30 09:17:13 2014
@@ -126,6 +126,10 @@
<code>org.apache.commons.logging.Log</code> but
<code>org.apache.juli.logging.Log</code>. (kfujino)
</fix>
+ <fix>
+ <bug>56082</bug>: Fix a concurrency bug in JULI's LogManager
+ implementation. (markt)
+ </fix>
</changelog>
</subsection>
<subsection name="Coyote">
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