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Posted to users@tomcat.apache.org by ilya goberman <go...@msn.com> on 2011/01/12 23:08:24 UTC
Memory leak in Tomcat 7?
Greetings,
Today I have encountered a nasty memory leak problem with Tomcat 7.0.4. The problem does not exist in Tomcat 6.
This is the most basic Servlet functionality. Can someone confirm it is broken?
I wrote a simple Servlet that sends data. The client just makes the call to the Servlet and issues a new call when the current call has completed. So it essentially calls the Servlet in the loop.
After running it for a minute, Tomcat generates a message:
Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint$SocketProcessor run
SEVERE:
java.lang.OutOfMemoryError: Java heap space
at org.apache.tomcat.util.buf.CharChunk.allocate(CharChunk.java:119)
at org.apache.tomcat.util.buf.CharChunk.<init>(CharChunk.java:83)
at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:162)
at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:146)
at org.apache.catalina.connector.Request.<init>(Request.java:252)
at org.apache.catalina.connector.Connector.createRequest(Connector.java:795)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:386)
at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:373)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1526)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
The Servlet code is below:
public class WebFrameworkServletScriptStreaming extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setHeader("pragma", "no-cache,no-store");
response.setHeader("cache-control", "no-cache,no-store,max-age=0,max-stale=0");
response.setContentType("text/json");
PrintWriter out = response.getWriter();
for (int i = 0; i < 1000; i++) {
out.print("push('{\"foo\":\"bar\"}');");
}
}
}
This is the client - use FF:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
<html>
<head>
<title>test</title>
</head>
<body">
<input type="button" value="TEST" onclick="test(); return false;" />
<script type="text/javascript">
var id = 0;
function test() {
var head = document.getElementsByTagName('head')[0];
var script = document.createElement('script');
script.type = 'text/javascript';
script.onreadystatechange = function () {
};
script.onload = function () {
head.removeChild(script);
// LOOP!!!
test();
};
script.onerror = function () {
head.removeChild(script);
};
script.src = 'http://172.16.16.250/Test/Controller?test=' + (id++);
head.appendChild(script);
}
function push(json) {
}
</script>
</body>
</html>
Re: Memory leak in Tomcat 7?
Posted by Christopher Schultz <ch...@christopherschultz.net>.
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Hash: SHA1
Ilya,
Oops, I see that the script will be loaded immediately by the browser. I
was expecting to see an XMLHttpRequest in there somewhere.
Can you post a segment of your access log that you get when you first
load this page?
- -chris
On 1/12/2011 5:08 PM, ilya goberman wrote:
>
> Greetings,
> Today I have encountered a nasty memory leak problem with Tomcat 7.0.4. The problem does not exist in Tomcat 6.
> This is the most basic Servlet functionality. Can someone confirm it is broken?
>
> I wrote a simple Servlet that sends data. The client just makes the call to the Servlet and issues a new call when the current call has completed. So it essentially calls the Servlet in the loop.
> After running it for a minute, Tomcat generates a message:
>
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint$SocketProcessor run
> SEVERE:
> java.lang.OutOfMemoryError: Java heap space
> at org.apache.tomcat.util.buf.CharChunk.allocate(CharChunk.java:119)
> at org.apache.tomcat.util.buf.CharChunk.<init>(CharChunk.java:83)
> at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:162)
> at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:146)
> at org.apache.catalina.connector.Request.<init>(Request.java:252)
> at org.apache.catalina.connector.Connector.createRequest(Connector.java:795)
> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
> at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:386)
> at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:373)
> at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1526)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
>
> The Servlet code is below:
>
> public class WebFrameworkServletScriptStreaming extends HttpServlet {
>
> public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
> response.setHeader("pragma", "no-cache,no-store");
> response.setHeader("cache-control", "no-cache,no-store,max-age=0,max-stale=0");
>
> response.setContentType("text/json");
>
> PrintWriter out = response.getWriter();
>
> for (int i = 0; i < 1000; i++) {
> out.print("push('{\"foo\":\"bar\"}');");
> }
> }
> }
>
> This is the client - use FF:
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
> <html>
> <head>
> <title>test</title>
> </head>
> <body">
> <input type="button" value="TEST" onclick="test(); return false;" />
>
> <script type="text/javascript">
> var id = 0;
>
> function test() {
> var head = document.getElementsByTagName('head')[0];
> var script = document.createElement('script');
> script.type = 'text/javascript';
> script.onreadystatechange = function () {
> };
> script.onload = function () {
> head.removeChild(script);
> // LOOP!!!
> test();
> };
> script.onerror = function () {
> head.removeChild(script);
> };
> script.src = 'http://172.16.16.250/Test/Controller?test=' + (id++);
> head.appendChild(script);
> }
>
> function push(json) {
> }
>
> </script>
>
> </body>
> </html>
>
>
>
>
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Re: Memory leak in Tomcat 7?
Posted by Christopher Schultz <ch...@christopherschultz.net>.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Ilya,
On 1/12/2011 5:08 PM, ilya goberman wrote:
> public class WebFrameworkServletScriptStreaming extends HttpServlet {
>
> public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
> response.setHeader("pragma", "no-cache,no-store");
> response.setHeader("cache-control", "no-cache,no-store,max-age=0,max-stale=0");
>
> response.setContentType("text/json");
>
> PrintWriter out = response.getWriter();
>
> for (int i = 0; i < 1000; i++) {
> out.print("push('{\"foo\":\"bar\"}');");
> }
> }
> }
Looks fairly benign.
> This is the client - use FF:
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
> <html>
> <head>
> <title>test</title>
> </head>
> <body">
> <input type="button" value="TEST" onclick="test(); return false;" />
>
> <script type="text/javascript">
> var id = 0;
>
> function test() {
> var head = document.getElementsByTagName('head')[0];
> var script = document.createElement('script');
> script.type = 'text/javascript';
> script.onreadystatechange = function () {
> };
> script.onload = function () {
> head.removeChild(script);
> // LOOP!!!
> test();
> };
> script.onerror = function () {
> head.removeChild(script);
> };
> script.src = 'http://172.16.16.250/Test/Controller?test=' + (id++);
> head.appendChild(script);
> }
>
> function push(json) {
> }
>
> </script>
>
> </body>
> </html>
I don't see where that client connects to any server.
- -chris
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RE: Memory leak in Tomcat 7?
Posted by ilya goberman <go...@msn.com>.
OK, I will upgrade.
> Date: Wed, 12 Jan 2011 22:41:28 +0000
> From: markt@apache.org
> To: users@tomcat.apache.org
> Subject: Re: Memory leak in Tomcat 7?
>
> On 12/01/2011 22:08, ilya goberman wrote:
> >
> > Greetings,
> > Today I have encountered a nasty memory leak problem with Tomcat 7.0.4. The problem does not exist in Tomcat 6.
>
> Known issue, already fixed in 7.0.6 which looks to be on track for
> release later this week. To work around it, don't use the NIO connector.
>
> Mark
>
> > This is the most basic Servlet functionality. Can someone confirm it is broken?
> >
> > I wrote a simple Servlet that sends data. The client just makes the call to the Servlet and issues a new call when the current call has completed. So it essentially calls the Servlet in the loop.
> > After running it for a minute, Tomcat generates a message:
> >
> > Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint$SocketProcessor run
> > SEVERE:
> > java.lang.OutOfMemoryError: Java heap space
> > at org.apache.tomcat.util.buf.CharChunk.allocate(CharChunk.java:119)
> > at org.apache.tomcat.util.buf.CharChunk.<init>(CharChunk.java:83)
> > at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:162)
> > at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:146)
> > at org.apache.catalina.connector.Request.<init>(Request.java:252)
> > at org.apache.catalina.connector.Connector.createRequest(Connector.java:795)
> > at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
> > at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:386)
> > at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:373)
> > at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1526)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> > at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> > at java.lang.Thread.run(Thread.java:619)
> > Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> > SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
> > Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> > SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
> >
> > The Servlet code is below:
> >
> > public class WebFrameworkServletScriptStreaming extends HttpServlet {
> >
> > public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
> > response.setHeader("pragma", "no-cache,no-store");
> > response.setHeader("cache-control", "no-cache,no-store,max-age=0,max-stale=0");
> >
> > response.setContentType("text/json");
> >
> > PrintWriter out = response.getWriter();
> >
> > for (int i = 0; i < 1000; i++) {
> > out.print("push('{\"foo\":\"bar\"}');");
> > }
> > }
> > }
> >
> > This is the client - use FF:
> > <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
> > <html>
> > <head>
> > <title>test</title>
> > </head>
> > <body">
> > <input type="button" value="TEST" onclick="test(); return false;" />
> >
> > <script type="text/javascript">
> > var id = 0;
> >
> > function test() {
> > var head = document.getElementsByTagName('head')[0];
> > var script = document.createElement('script');
> > script.type = 'text/javascript';
> > script.onreadystatechange = function () {
> > };
> > script.onload = function () {
> > head.removeChild(script);
> > // LOOP!!!
> > test();
> > };
> > script.onerror = function () {
> > head.removeChild(script);
> > };
> > script.src = 'http://172.16.16.250/Test/Controller?test=' + (id++);
> > head.appendChild(script);
> > }
> >
> > function push(json) {
> > }
> >
> > </script>
> >
> > </body>
> > </html>
> >
> >
> >
> >
>
>
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> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
Re: Memory leak in Tomcat 7?
Posted by Mark Thomas <ma...@apache.org>.
On 12/01/2011 22:08, ilya goberman wrote:
>
> Greetings,
> Today I have encountered a nasty memory leak problem with Tomcat 7.0.4. The problem does not exist in Tomcat 6.
Known issue, already fixed in 7.0.6 which looks to be on track for
release later this week. To work around it, don't use the NIO connector.
Mark
> This is the most basic Servlet functionality. Can someone confirm it is broken?
>
> I wrote a simple Servlet that sends data. The client just makes the call to the Servlet and issues a new call when the current call has completed. So it essentially calls the Servlet in the loop.
> After running it for a minute, Tomcat generates a message:
>
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint$SocketProcessor run
> SEVERE:
> java.lang.OutOfMemoryError: Java heap space
> at org.apache.tomcat.util.buf.CharChunk.allocate(CharChunk.java:119)
> at org.apache.tomcat.util.buf.CharChunk.<init>(CharChunk.java:83)
> at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:162)
> at org.apache.catalina.connector.InputBuffer.<init>(InputBuffer.java:146)
> at org.apache.catalina.connector.Request.<init>(Request.java:252)
> at org.apache.catalina.connector.Connector.createRequest(Connector.java:795)
> at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
> at org.apache.coyote.http11.Http11NioProcessor.process(Http11NioProcessor.java:386)
> at org.apache.coyote.http11.Http11NioProtocol$Http11ConnectionHandler.process(Http11NioProtocol.java:373)
> at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1526)
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:619)
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
> Jan 12, 2011 3:59:55 PM org.apache.tomcat.util.net.NioEndpoint checkParachute
> SEVERE: SEVERE:Memory usage is low, parachute is non existent, your system may start failing.
>
> The Servlet code is below:
>
> public class WebFrameworkServletScriptStreaming extends HttpServlet {
>
> public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
> response.setHeader("pragma", "no-cache,no-store");
> response.setHeader("cache-control", "no-cache,no-store,max-age=0,max-stale=0");
>
> response.setContentType("text/json");
>
> PrintWriter out = response.getWriter();
>
> for (int i = 0; i < 1000; i++) {
> out.print("push('{\"foo\":\"bar\"}');");
> }
> }
> }
>
> This is the client - use FF:
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/1999/REC-html401-19991224/loose.dtd">
> <html>
> <head>
> <title>test</title>
> </head>
> <body">
> <input type="button" value="TEST" onclick="test(); return false;" />
>
> <script type="text/javascript">
> var id = 0;
>
> function test() {
> var head = document.getElementsByTagName('head')[0];
> var script = document.createElement('script');
> script.type = 'text/javascript';
> script.onreadystatechange = function () {
> };
> script.onload = function () {
> head.removeChild(script);
> // LOOP!!!
> test();
> };
> script.onerror = function () {
> head.removeChild(script);
> };
> script.src = 'http://172.16.16.250/Test/Controller?test=' + (id++);
> head.appendChild(script);
> }
>
> function push(json) {
> }
>
> </script>
>
> </body>
> </html>
>
>
>
>
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