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<p>Probably you are doing a very large POST or PUT to a secure URL,
the adapter is trying to save the request in the HttpSession and
running into buffer limits. getMaxSavePostSize() Probably a
tomcat setting somewhere.<br>
</p>
<br>
<div class="moz-cite-prefix">On 6/13/16 12:59 PM, Richard Lavallee
wrote:<br>
</div>
<blockquote cite="mid:BLU181-W39C7DAC79BE276D9DB27D7CB530@phx.gbl"
type="cite">
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<p style="background-color: rgb(255, 255, 255);"><font
face="arial, sans-serif" color="#222222"><span
style="font-size: 12.8px;"><b>Is anyone familiar with the
below stack trace trying to connect Keycloak to Tomcat,
please?</b></span></font></p>
<p style="color: rgb(34, 34, 34); font-family: arial,
sans-serif; font-size: 12.8px; background-color: rgb(255, 255,
255);"><b><br>
</b></p>
<p style="color: rgb(34, 34, 34); font-family: arial,
sans-serif; font-size: 12.8px; background-color: rgb(255, 255,
255);"><b>type</b> Exception report</p>
<p style="color: rgb(34, 34, 34); font-family: arial,
sans-serif; font-size: 12.8px; background-color: rgb(255, 255,
255);"><b>message</b> <u>Could not create authentication
request.</u></p>
<p style="color: rgb(34, 34, 34); font-family: arial,
sans-serif; font-size: 12.8px; background-color: rgb(255, 255,
255);"><b>description</b> <u>The server encountered an
internal error that prevented it from fulfilling this
request.</u></p>
<p style="color: rgb(34, 34, 34); font-family: arial,
sans-serif; font-size: 12.8px; background-color: rgb(255, 255,
255);"><b>exception</b></p>
<pre style="white-space: pre-wrap; color: rgb(34, 34, 34); background-color: rgb(255, 255, 255);">java.lang.RuntimeException: Could not create authentication request.
org.keycloak.adapters.saml.<wbr>AbstractInitiateLogin.<wbr>challenge(<wbr>AbstractInitiateLogin.java:63)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.executeAuthenticator(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:247)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.authenticateInternal(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:222)
org.keycloak.adapters.saml.<wbr>tomcat.SamlAuthenticatorValve.<wbr>authenticate(<wbr>SamlAuthenticatorValve.java:<wbr>42)
org.apache.catalina.<wbr>authenticator.<wbr>AuthenticatorBase.invoke(<wbr>AuthenticatorBase.java:574)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.invoke(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:184)
org.apache.catalina.valves.<wbr>ErrorReportValve.invoke(<wbr>ErrorReportValve.java:99)
org.apache.catalina.valves.<wbr>AccessLogValve.invoke(<wbr>AccessLogValve.java:953)
org.apache.catalina.connector.<wbr>CoyoteAdapter.service(<wbr>CoyoteAdapter.java:408)
org.apache.coyote.http11.<wbr>AbstractHttp11Processor.<wbr>process(<wbr>AbstractHttp11Processor.java:<wbr>1023)
org.apache.coyote.<wbr>AbstractProtocol$<wbr>AbstractConnectionHandler.<wbr>process(AbstractProtocol.java:<wbr>589)
org.apache.tomcat.util.net.<wbr>JIoEndpoint$SocketProcessor.<wbr>run(JIoEndpoint.java:312)
java.util.concurrent.<wbr>ThreadPoolExecutor.runWorker(<wbr>ThreadPoolExecutor.java:1145)
java.util.concurrent.<wbr>ThreadPoolExecutor$Worker.run(<wbr>ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.<wbr>java:744)
</pre><p style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px; background-color: rgb(255, 255, 255);"><b>root cause</b></p><pre style="white-space: pre-wrap; color: rgb(34, 34, 34); background-color: rgb(255, 255, 255);">java.lang.RuntimeException: java.io.IOException: Buffer overflow, no sink 4096 4096
org.keycloak.adapters.saml.<wbr>CatalinaSamlSessionStore.<wbr>saveRequest(<wbr>CatalinaSamlSessionStore.java:<wbr>226)
org.keycloak.adapters.saml.<wbr>AbstractInitiateLogin.<wbr>challenge(<wbr>AbstractInitiateLogin.java:58)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.executeAuthenticator(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:247)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.authenticateInternal(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:222)
org.keycloak.adapters.saml.<wbr>tomcat.SamlAuthenticatorValve.<wbr>authenticate(<wbr>SamlAuthenticatorValve.java:<wbr>42)
org.apache.catalina.<wbr>authenticator.<wbr>AuthenticatorBase.invoke(<wbr>AuthenticatorBase.java:574)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.invoke(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:184)
org.apache.catalina.valves.<wbr>ErrorReportValve.invoke(<wbr>ErrorReportValve.java:99)
org.apache.catalina.valves.<wbr>AccessLogValve.invoke(<wbr>AccessLogValve.java:953)
org.apache.catalina.connector.<wbr>CoyoteAdapter.service(<wbr>CoyoteAdapter.java:408)
org.apache.coyote.http11.<wbr>AbstractHttp11Processor.<wbr>process(<wbr>AbstractHttp11Processor.java:<wbr>1023)
org.apache.coyote.<wbr>AbstractProtocol$<wbr>AbstractConnectionHandler.<wbr>process(AbstractProtocol.java:<wbr>589)
org.apache.tomcat.util.net.<wbr>JIoEndpoint$SocketProcessor.<wbr>run(JIoEndpoint.java:312)
java.util.concurrent.<wbr>ThreadPoolExecutor.runWorker(<wbr>ThreadPoolExecutor.java:1145)
java.util.concurrent.<wbr>ThreadPoolExecutor$Worker.run(<wbr>ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.<wbr>java:744)
</pre><p style="color: rgb(34, 34, 34); font-family: arial, sans-serif; font-size: 12.8px; background-color: rgb(255, 255, 255);"><b>root cause</b></p><pre style="white-space: pre-wrap; color: rgb(34, 34, 34); background-color: rgb(255, 255, 255);">java.io.IOException: Buffer overflow, no sink 4096 4096
org.apache.tomcat.util.buf.<wbr>ByteChunk.flushBuffer(<wbr>ByteChunk.java:477)
org.apache.tomcat.util.buf.<wbr>ByteChunk.append(ByteChunk.<wbr>java:366)
org.apache.catalina.<wbr>authenticator.<wbr>FormAuthenticator.saveRequest(<wbr>FormAuthenticator.java:664)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.keycloakSaveRequest(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:253)
org.keycloak.adapters.saml.<wbr>CatalinaSamlSessionStore.<wbr>saveRequest(<wbr>CatalinaSamlSessionStore.java:<wbr>224)
org.keycloak.adapters.saml.<wbr>AbstractInitiateLogin.<wbr>challenge(<wbr>AbstractInitiateLogin.java:58)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.executeAuthenticator(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:247)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.authenticateInternal(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:222)
org.keycloak.adapters.saml.<wbr>tomcat.SamlAuthenticatorValve.<wbr>authenticate(<wbr>SamlAuthenticatorValve.java:<wbr>42)
org.apache.catalina.<wbr>authenticator.<wbr>AuthenticatorBase.invoke(<wbr>AuthenticatorBase.java:574)
org.keycloak.adapters.saml.<wbr>AbstractSamlAuthenticatorValve<wbr>.invoke(<wbr>AbstractSamlAuthenticatorValve<wbr>.java:184)
org.apache.catalina.valves.<wbr>ErrorReportValve.invoke(<wbr>ErrorReportValve.java:99)
org.apache.catalina.valves.<wbr>AccessLogValve.invoke(<wbr>AccessLogValve.java:953)
org.apache.catalina.connector.<wbr>CoyoteAdapter.service(<wbr>CoyoteAdapter.java:408)
org.apache.coyote.http11.<wbr>AbstractHttp11Processor.<wbr>process(<wbr>AbstractHttp11Processor.java:<wbr>1023)
org.apache.coyote.<wbr>AbstractProtocol$<wbr>AbstractConnectionHandler.<wbr>process(AbstractProtocol.java:<wbr>589)
org.apache.tomcat.util.net.<wbr>JIoEndpoint$SocketProcessor.<wbr>run(JIoEndpoint.java:312)
java.util.concurrent.<wbr>ThreadPoolExecutor.runWorker(<wbr>ThreadPoolExecutor.java:1145)
java.util.concurrent.<wbr>ThreadPoolExecutor$Worker.run(<wbr>ThreadPoolExecutor.java:615)
java.lang.Thread.run(Thread.<wbr>java:744)</pre>
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