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https://issues.apache.org/jira/browse/ZOOKEEPER-5019?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Peter Gyori updated ZOOKEEPER-5019:
-----------------------------------
Description:
When a client sends a malformed message to Zookeeper, the following message is
shown in the Zookeeper log:
_"Len error. A message from <address> with advertised length of <length> is
either a malformed message or too large to process (length is greater than
jute.maxbuffer=<buffersize>)"_
When the client is using TLS but Zookeeper is not, the above message is shown.
To make it easier to recognize such a case, I recommend extending the error
message with the possible root cause:
_"Len error. A message from <address> with advertised length of <length> is
either a malformed message or too large to process (length is greater than
jute.maxbuffer=<buffersize>). {*}Note: If the length appears unusually large,
this may be a TLS/SSL connection attempt on a non-secure port.{*}"_
The "magic number" that appears as the length with an attempted TLS handshake
is 369296129.
was:
When a client sends a malformed message to Zookeeper, the following message is
shown in the log:
_"Len error. A message from <address> with advertised length of <length> is
either a malformed message or too large to process (length is greater than
jute.maxbuffer=<buffersize>)"_
When the client is using TLS but Zookeeper is not, the above message is shown.
To make it easier to recognize such a case, I recommend extending the error
message with the possible root cause:
_"Len error. A message from <address> with advertised length of <length> is
either a malformed message or too large to process (length is greater than
jute.maxbuffer=<buffersize>). {*}Note: If the length appears unusually large,
this may be a TLS/SSL connection attempt on a non-secure port.{*}"_
The "magic number" that appears as the length with an attempted TLS handshake
is 369296129.
> Improve the error message when the message sent by a client is malformed
> ------------------------------------------------------------------------
>
> Key: ZOOKEEPER-5019
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-5019
> Project: ZooKeeper
> Issue Type: Improvement
> Components: server
> Affects Versions: 3.9.4
> Reporter: Peter Gyori
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> When a client sends a malformed message to Zookeeper, the following message
> is shown in the Zookeeper log:
> _"Len error. A message from <address> with advertised length of <length> is
> either a malformed message or too large to process (length is greater than
> jute.maxbuffer=<buffersize>)"_
> When the client is using TLS but Zookeeper is not, the above message is
> shown. To make it easier to recognize such a case, I recommend extending the
> error message with the possible root cause:
> _"Len error. A message from <address> with advertised length of <length> is
> either a malformed message or too large to process (length is greater than
> jute.maxbuffer=<buffersize>). {*}Note: If the length appears unusually large,
> this may be a TLS/SSL connection attempt on a non-secure port.{*}"_
> The "magic number" that appears as the length with an attempted TLS handshake
> is 369296129.
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