MaxHTTPHeaderSize

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MaxHTTPHeaderSize

MaxHTTPHeaderSize

2007-08-08 - By Rob Kirkbride

Back

Reply: 1 2 3

Hi,

I've been getting a lot MsgAjp Overflow messages recently. The strange
this is only seems to happen only 1 app server at a time and seems to
stop and start in bursts of sometimes over an hour, but then nothing for
several hours after that.
This is with Tomcat 5.5.20 and mod_jk 1.2.23.

Is it possible that it is someone trying to provoke a DOS or should I
really investigate increasing the maxhttpheadersize in server.xml and
max_http_size in Mod_jk?

Thanks for any help,

Rob

2007-08-08 08:36:47,579 ERROR [ ] [org.apache.jk.common.MsgAjp] Buffer
overflow
: buffer.len=8192 pos=259 data=20202
2007-08-08 08:36:47,580 ERROR [ ] [org.apache.jk.common.MsgAjp] Overflow
java.lang.Throwable
at org.apache.jk.common.MsgAjp.cpBytes(MsgAjp.java:194)
at org.apache.jk.common.MsgAjp.appendByteChunk(MsgAjp.java:168)
at org.apache.jk.common.MsgAjp.appendBytes(MsgAjp.java:154)
at
org.apache.jk.common.JkInputStream.appendHead(JkInputStream.java:302)
at org.apache.jk.core.MsgContext.action(MsgContext.java:258)
at org.apache.coyote.Response.action(Response.java:182)
at org.apache.coyote.Response.sendHeaders(Response.java:378)
at
org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:
317)
at
org.apache.catalina.connector.OutputBuffer.close(OutputBuffer.java:27
8)
at
org.apache.catalina.connector.Response.finishResponse(Response.java:4
76)
at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.jav
a:151)

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