java net SocketTimeoutException Read timed out under Tomcat

Question

I have a Tomcat based web application  I am intermittently getting the following exception  Caused by  java net SocketTimeoutException  Read timed out     at java net SocketInputStream socketRead0 Native Method      at java net SocketInputStream read SocketInputStream java 150      at java net SocketInputStream read SocketInputStream java 121      at org apache coyote http11 InternalInputBuffer fill InternalInputBuffer java 532      at org apache coyote http11 InternalInputBuffer fill InternalInputBuffer java 501      at org apache coyote http11 InternalInputBuffer InputStreamInputBuffer doRead InternalInputBuffer java 563      at org apache coyote http11 filters IdentityInputFilter doRead IdentityInputFilter java 124      at org apache coyote http11 AbstractInputBuffer doRead AbstractInputBuffer java 346      at org apache coyote Request doRead Request java 422      at org apache catalina connector InputBuffer realReadBytes InputBuffer java 290      at org apache tomcat util buf ByteChunk substract ByteChunk java 431      at org apache catalina connector InputBuffer read InputBuffer java 315      at org apache catalina connector CoyoteInputStream read CoyoteInputStream java 200      at java nio channels Channels ReadableByteChannelImpl read Channels java 385   Unfortunately I don t have access to the client  so I am just trying to confirm on various reasons this can happen   Server is trying to read data from the request  but its taking longer than the timeout value for the data to arrive from the client  Timeout here would typically be Tomcat connector   connectionTimeout attribute   Client has a read timeout set  and server is taking longer than that to respond   One of the threads I went through  said this can happen with high concurrency and if the keepalive is enabled    For  1  the initial value I had set was 20 sec  I have bumped this up to 60sec  will test  and see if there are any changes  Meanwhile  if any of you guys can provide you expert opinion on this  that l be really helpful  Or for that matter any other reason you can think of which might cause this issue

User · Answer

Here are the basic instructions -   Locate the  server xml  file in the  conf  folder beneath Tomcat s base directory  i e   CATALINA HOME  conf server xml   Open the file in an editor and search for  lt Connector  Locate the relevant connector that is timing out - this will typically be the HTTP connector  i e  the one with protocol  HTTP 1 1   If a connectionTimeout value is set on the connector  it may need to be increased - e g  from 20000 milliseconds    20 seconds  to 120000 milliseconds    2 minutes   If no connectionTimeout property value is set on the connector  the default is 60 seconds - if this is insufficient  the property may need to be added  Restart Tomcat

User · Answer

I am using 11 2 and received timeouts   I resolved by using the version of jsoup below        lt dependency gt           lt groupId gt org jsoup lt  groupId gt           lt artifactId gt jsoup lt  artifactId gt           lt version gt 1 7 2 lt  version gt           lt scope gt compile lt  scope gt       lt  dependency gt

User · Answer

Server is trying to read data from the request  but its taking longer than the timeout value for the data to arrive from the client  Timeout here would typically be tomcat connector -  connectionTimeout attribute    Correct      Client has a read timeout set  and server is taking longer than that to respond    No  That would cause a timeout at the client      One of the threads i went through  said this can happen with high concurrency and if the keepalive is enabled    That is obviously guesswork  and completely incorrect  It happens if and only if no data arrives within the timeout  Period  Load and keepalive and concurrency have nothing to do with it whatsoever   It just means the client isn t sending  You don t need to worry about it  Browser clients come and go in all sorts of strange ways

User · Answer

I had the same problem while trying to read the data from the request body  In my case which occurs randomly only to the mobile-based client devices  So I have increased the connectionUploadTimeout to 1min as suggested by this link

User · Answer

Connection Response resp   Jsoup connect url                      timeout 20000                      method Connection Method GET                      execute      actually  the error occurs when you have slow internet so try to maximize the timeout time and then your code will definitely work as it works for me

User · Answer

I have the same issue  The java net SocketTimeoutException  Read timed out error happens on Tomcat under Mac 11 1  but it works perfectly in Mac 10 13  Same Tomcat folder  same WAR file  Have tried setting timeout values higher  but nothing I do works  If I run the same SpringBoot code in a regular Java application  outside Tomcat 9 0 41  tried other versions too   then it works also  Mac 11 1 appears to be interfering with Tomcat  As another test  if I copy the WAR file to an AWS EC2 instance  it works fine there too  Spent several days trying to figure this out  but cannot resolve  Suggestions very welcome

[java] java.net.SocketTimeoutException: Read timed out under Tomcat

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