java.lang.IllegalArgumentException: Request header is too large

Stack Overflow | Sarthak | 6 months ago
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    samebug tip
    URI part of the request contains invalid characters. You may try to encode the path from the URI. Check RFC7230 and RFC3986 documentation below. https://www.ietf.org/rfc/rfc3986.txt and https://tools.ietf.org/html/rfc7230
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    This error is caused by malformed HTTP request. You are trying to access unsecured page through https.
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    Some bots are sending malformed HTTP requests to your site. Try to find their IP addresses in the access logs and ask them to fix the bots or blacklist them.
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    JAVA -tomcat- Request header is too large

    Stack Overflow | 6 months ago | Sarthak
    java.lang.IllegalArgumentException: Request header is too large
  6. 0

    Occassional 400 responses from JWS 3 Tomcat - Red Hat Customer Portal

    redhat.com | 7 months ago
    java.lang.IllegalArgumentException: Request header is too large

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Root Cause Analysis

  1. java.lang.IllegalArgumentException

    Request header is too large

    at org.apache.coyote.http11.InternalInputBuffer.fill()
  2. Grizzly HTTP
    JIoEndpoint$SocketProcessor.run
    1. org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:512)
    2. org.apache.coyote.http11.InternalInputBuffer.fill(InternalInputBuffer.java:501)
    3. org.apache.coyote.http11.InternalInputBuffer.parseRequestLine(InternalInputBuffer.java:171)
    4. org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:996)
    5. org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:623)
    6. org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:318)
    6 frames
  3. Java RT
    ThreadPoolExecutor$Worker.run
    1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
    2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
    2 frames
  4. Tomcat Util
    TaskThread$WrappingRunnable.run
    1. org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    1 frame