Tomcat can not forward error code 500 when the page too large

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0
down vote

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My environment:
ubuntu 18.04
openjdk version "1.8.0_181"
tomcat 7.0.91

And I put these into WEB-INF/web.xml

<error-page>
 <error-code>500</error-code>
 <location>/500.html</location>
</error-page>
<error-page>
 <exception-type>java.lang.Exception</exception-type>
 <location>/500.html</location>
</error-page>

Now I write a test.jsp as:

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<c:forEach begin="1" end="1000" step="1" var="i">
just test exception forward.
</c:forEach>
<%
 Object o = null;
 String s = o.toString();
%>
</body>
</html>

It will get an exception and goto /500.html. but it can not, when the exception, it just include the 500.html into current page.

I think the page is too large, if I put end="100" of c:forEach, it will forward 500.html.

How to fix this please?

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

1

You need to understand that at some point the servlet container (Tomcat) decides to actually start sending data over the wire (usually when an output buffer reaches some threshold). If anything happens after that point, there is nothing much a server can do to take back the data that has already been sent. docs.oracle.com/javaee/6/api/javax/servlet/…
– Pavel Horal
Nov 11 at 0:51

@PavelHoral Thank you. and is there a parameter to adjust buffer-size please?
– xunitc
Nov 11 at 0:57

1

I am not sure as I never needed to change such thing.... maybe socket.appWriteBufSize tomcat.apache.org/tomcat-8.5-doc/config/http.html . But I would say you just need to write your app in a different way... maybe don't write Java code into JSP as that is considered a bad practice.
– Pavel Horal
Nov 11 at 1:57

@PavelHoral Thank you. but it can not work. There are few java code in jsp (3 lines), just some el expression. but too many html(compressed) in it. Now I put the 3 lines java code to the head of jsp, it will ok.
– xunitc
Nov 11 at 2:38

add a comment |

up vote
0
down vote

favorite

My environment:
ubuntu 18.04
openjdk version "1.8.0_181"
tomcat 7.0.91

And I put these into WEB-INF/web.xml

<error-page>
 <error-code>500</error-code>
 <location>/500.html</location>
</error-page>
<error-page>
 <exception-type>java.lang.Exception</exception-type>
 <location>/500.html</location>
</error-page>

Now I write a test.jsp as:

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<c:forEach begin="1" end="1000" step="1" var="i">
just test exception forward.
</c:forEach>
<%
 Object o = null;
 String s = o.toString();
%>
</body>
</html>

It will get an exception and goto /500.html. but it can not, when the exception, it just include the 500.html into current page.

I think the page is too large, if I put end="100" of c:forEach, it will forward 500.html.

How to fix this please?

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

1

You need to understand that at some point the servlet container (Tomcat) decides to actually start sending data over the wire (usually when an output buffer reaches some threshold). If anything happens after that point, there is nothing much a server can do to take back the data that has already been sent. docs.oracle.com/javaee/6/api/javax/servlet/…
– Pavel Horal
Nov 11 at 0:51

@PavelHoral Thank you. and is there a parameter to adjust buffer-size please?
– xunitc
Nov 11 at 0:57

1

I am not sure as I never needed to change such thing.... maybe socket.appWriteBufSize tomcat.apache.org/tomcat-8.5-doc/config/http.html . But I would say you just need to write your app in a different way... maybe don't write Java code into JSP as that is considered a bad practice.
– Pavel Horal
Nov 11 at 1:57

@PavelHoral Thank you. but it can not work. There are few java code in jsp (3 lines), just some el expression. but too many html(compressed) in it. Now I put the 3 lines java code to the head of jsp, it will ok.
– xunitc
Nov 11 at 2:38

add a comment |

up vote
0
down vote

favorite

My environment:
ubuntu 18.04
openjdk version "1.8.0_181"
tomcat 7.0.91

And I put these into WEB-INF/web.xml

<error-page>
 <error-code>500</error-code>
 <location>/500.html</location>
</error-page>
<error-page>
 <exception-type>java.lang.Exception</exception-type>
 <location>/500.html</location>
</error-page>

Now I write a test.jsp as:

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<c:forEach begin="1" end="1000" step="1" var="i">
just test exception forward.
</c:forEach>
<%
 Object o = null;
 String s = o.toString();
%>
</body>
</html>

It will get an exception and goto /500.html. but it can not, when the exception, it just include the 500.html into current page.

I think the page is too large, if I put end="100" of c:forEach, it will forward 500.html.

How to fix this please?

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

My environment:
ubuntu 18.04
openjdk version "1.8.0_181"
tomcat 7.0.91

And I put these into WEB-INF/web.xml

<error-page>
 <error-code>500</error-code>
 <location>/500.html</location>
</error-page>
<error-page>
 <exception-type>java.lang.Exception</exception-type>
 <location>/500.html</location>
</error-page>

Now I write a test.jsp as:

<%@taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
<!DOCTYPE HTML>
<html>
<head>
</head>
<body>
<c:forEach begin="1" end="1000" step="1" var="i">
just test exception forward.
</c:forEach>
<%
 Object o = null;
 String s = o.toString();
%>
</body>
</html>

It will get an exception and goto /500.html. but it can not, when the exception, it just include the 500.html into current page.

I think the page is too large, if I put end="100" of c:forEach, it will forward 500.html.

How to fix this please?

tomcat error-code

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

edited Nov 11 at 0:44

asked Nov 11 at 0:39

xunitc

266

asked Nov 11 at 0:39

xunitc

266

asked Nov 11 at 0:39

xunitc

266

1

You need to understand that at some point the servlet container (Tomcat) decides to actually start sending data over the wire (usually when an output buffer reaches some threshold). If anything happens after that point, there is nothing much a server can do to take back the data that has already been sent. docs.oracle.com/javaee/6/api/javax/servlet/…
– Pavel Horal
Nov 11 at 0:51

@PavelHoral Thank you. and is there a parameter to adjust buffer-size please?
– xunitc
Nov 11 at 0:57

1

I am not sure as I never needed to change such thing.... maybe socket.appWriteBufSize tomcat.apache.org/tomcat-8.5-doc/config/http.html . But I would say you just need to write your app in a different way... maybe don't write Java code into JSP as that is considered a bad practice.
– Pavel Horal
Nov 11 at 1:57

@PavelHoral Thank you. but it can not work. There are few java code in jsp (3 lines), just some el expression. but too many html(compressed) in it. Now I put the 3 lines java code to the head of jsp, it will ok.
– xunitc
Nov 11 at 2:38

add a comment |

1

You need to understand that at some point the servlet container (Tomcat) decides to actually start sending data over the wire (usually when an output buffer reaches some threshold). If anything happens after that point, there is nothing much a server can do to take back the data that has already been sent. docs.oracle.com/javaee/6/api/javax/servlet/…
– Pavel Horal
Nov 11 at 0:51

@PavelHoral Thank you. and is there a parameter to adjust buffer-size please?
– xunitc
Nov 11 at 0:57

1

I am not sure as I never needed to change such thing.... maybe socket.appWriteBufSize tomcat.apache.org/tomcat-8.5-doc/config/http.html . But I would say you just need to write your app in a different way... maybe don't write Java code into JSP as that is considered a bad practice.
– Pavel Horal
Nov 11 at 1:57

@PavelHoral Thank you. but it can not work. There are few java code in jsp (3 lines), just some el expression. but too many html(compressed) in it. Now I put the 3 lines java code to the head of jsp, it will ok.
– xunitc
Nov 11 at 2:38

You need to understand that at some point the servlet container (Tomcat) decides to actually start sending data over the wire (usually when an output buffer reaches some threshold). If anything happens after that point, there is nothing much a server can do to take back the data that has already been sent. docs.oracle.com/javaee/6/api/javax/servlet/…
– Pavel Horal
Nov 11 at 0:51

@PavelHoral Thank you. and is there a parameter to adjust buffer-size please?
– xunitc
Nov 11 at 0:57

I am not sure as I never needed to change such thing.... maybe socket.appWriteBufSize tomcat.apache.org/tomcat-8.5-doc/config/http.html . But I would say you just need to write your app in a different way... maybe don't write Java code into JSP as that is considered a bad practice.
– Pavel Horal
Nov 11 at 1:57

@PavelHoral Thank you. but it can not work. There are few java code in jsp (3 lines), just some el expression. but too many html(compressed) in it. Now I put the 3 lines java code to the head of jsp, it will ok.
– xunitc
Nov 11 at 2:38

add a comment |

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