Dear all,
We are using Tomcat 8.5.53, and I have been noticing the attached below
exceptions in my logs. After looking deeply what kind of requests that caused
these exception, I noticed that some request include Null http protocol and
some special characters that cannot be handled by Tomcat. Also, we have noticed
that these kind of requests might crash the web server from time-time and
caused OutOfMemoryError.
I am not sure if this issue is a bug in Tomcat 8.x that it cannot handle these
requests, so could you please advise what’s recommended to avoid these
exceptions?
02-Mar-2021 01:33:04.846 INFO [https-jsse-nio-185.37.108.150-8443-exec-31]
org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request
header
Note: further occurrences of HTTP request parsing errors will be logged at
DEBUG level.
java.lang.IllegalArgumentException: Invalid character found in the HTTP
protocol
at
org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:567)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:502)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
24-May-2021 23:04:00.693 INFO [https-jsse-nio-185.37.108.150-8443-exec-309]
org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request
header
Note: further occurrences of HTTP request parsing errors will be logged at
DEBUG level.
java.lang.IllegalArgumentException: Invalid character found in
the request target. The valid characters are defined in RFC 7230 and RFC 3986
at
org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:502)
at
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:502)
at
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
at
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
at
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1623)
at
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Thanks!
Nada Aboueata
Nada Mahmoud Ahmed Aboueata
Application Developer
Information Technology Services Department
Tel.: +974 4403 6369
Fax: +974 4403 3401
[Qatar University]<http://www.qu.edu.qa>[QU on
Facebook]<https://www.facebook.com/qataruniversity> [QU on Twitter]
<https://twitter.com/qataruniversity> [QU on YouTube]
<http://www.youtube.com/qataruniversity> [QU on LinkedIn]
<http://www.linkedin.com/company/43068> [QU on Instagram]
<http://instagram.com/qataruniversity> [QU on Google+]
<https://plus.google.com/+qataruniversity/posts>
Our Vision: To be regionally recognized for distinctive excellence in education
and research, an institution of choice for students and scholars and a catalyst
for the sustainable socio-economic development of Qatar.
رؤيتنا: أن تعرف جامعة قطر إقليمياً بتميزها النوعي في التعليم والبحث وبكونها
الخيار المفضل لطلبة العلم والباحثين ومحفزاً للتنمية الاقتصادية والاجتماعية
المستدامة لدولة قطر.
