| <rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom"><channel><title>Apache Dubbo – 5 - Config Center</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/</link><description>Recent content in 5 - Config Center on Apache Dubbo</description><generator>Hugo -- gohugo.io</generator><language>en</language><atom:link href="https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/index.xml" rel="self" type="application/rss+xml"/><item><title>Docs3-V2: 5-1 - Failed to connect to configuration center</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/1/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/1/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The server where the configuration center is located is shut down or down.</li> |
| <li>Wrong IP or port number.</li> |
| <li>The firewall blocked the port of the configuration center by mistake.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check configuration center IP and port configuration.</li> |
| <li>Check whether the server is turned on and works normally.</li> |
| <li>Check whether the port used by the configuration center is allowed by the firewall or not.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-2 - Failed to register/unregister shutdown hook method</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/2/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/2/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>There are exceptions in the custom hook method and business processing logic.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the custom hook method and business processing logic for runtime exceptions.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-3 - An unexpected error occurred while destroying a method call</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/3/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/3/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>There is an exception in the business processing of the custom destruction method.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the custom destruction method and business processing logic for runtime exceptions.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-4 - Method not found in service interface</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/4/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/4/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The interface name#method called by the consumer does not exist.</li> |
| <li>The server does not expose the current interface correctly.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the interface name# method called by the consumer exists.</li> |
| <li>Check whether it exists in the service list exposed by the server.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-5 - Unable to get env variables</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/5/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/5/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>Environment variable could not be obtained.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the prompted variable name, whether it is configured and can be read and loaded normally.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-6 - Attribute Conflict of Interface Type</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/6/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/6/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The generalization definition is not configured correctly.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check that the generalization definition is correct.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-7 - An unexpected error occurred while canceling the export</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/7/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/7/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The service of the configuration center cannot be connected.</li> |
| <li>The configured protocol, IP, and port are incorrect.</li> |
| <li>The client version of the configuration center conflicts with the server version, and a valid connection cannot be established.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the service status of the configuration center is normal.</li> |
| <li>Check that the configured protocol, IP, and port are incorrect.</li> |
| <li>Check whether the version of the configuration center client used is compatible with the version of the server.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-8 - The protocol will use a random available port</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/8/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/8/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The port specified by the protocol is occupied, and the port is randomly selected for startup.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check whether the currently configured port is occupied by other applications.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-9 - Service Configuration Export Failed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/9/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/9/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The service of the configuration center cannot be connected.</li> |
| <li>The configured protocol, IP, and port are incorrect.</li> |
| <li>The client version of the configuration center conflicts with the server version, and a valid connection cannot be established.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the service status of the configuration center is normal.</li> |
| <li>Check that the configured protocol, IP, and port are incorrect.</li> |
| <li>Check whether the version of the configuration center client used is compatible with the version of the server.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-10 - Registration interface application mapping failed for service</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/10/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/10/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The service metadata exposed by the service does not match the application, or has been tampered with.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check that the metadata content in the configuration center matches that in the application.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-11 - Registration Instance Error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/11/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/11/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The service of the configuration center cannot be connected.</li> |
| <li>The configured protocol, IP, and port are incorrect.</li> |
| <li>The client version of the configuration center conflicts with the server version, and a valid connection cannot be established.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the service status of the configuration center is normal.</li> |
| <li>Check that the configured protocol, IP, and port are incorrect.</li> |
| <li>Check whether the version of the configuration center client used is compatible with the version of the server.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-12 - Refresh instance and metadata errors</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/12/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/12/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The service of the configuration center cannot be connected.</li> |
| <li>The configured protocol, IP, and port are incorrect.</li> |
| <li>The client version of the configuration center conflicts with the server version, and a valid connection cannot be established.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the service status of the configuration center is normal.</li> |
| <li>Check that the configured protocol, IP, and port are incorrect.</li> |
| <li>Check whether the version of the configuration center client used is compatible with the version of the server.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-13 - Model cannot be destroyed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/13/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/13/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>There is an exception in the business processing of the custom destruction method.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the custom destruction method and business processing logic for runtime exceptions.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-14 - Model startup error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/14/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/14/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The connection is disconnected while the service is waiting to publish or subscribe.</li> |
| <li>The network connection timed out.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the connection between the application server and the configuration center is normal.</li> |
| <li>Check whether there is a timeout in the network connection, etc.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-15 - Model Reference Error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/15/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/15/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The method of Dubbo core processing class is misused or tampered with.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check for misuse or decompiled modifications on the application.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-16 - Unable to find any valid agreements</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/16/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/16/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The configured protocol is not supported.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Currently supported protocols are dubbo, rmi, hessian, http, webservice, thrift, redis, etc.</p> |
| <h2 id="see-also">see also</h2> |
| <p><a href="https://dubbo.apache.org/zh-cn/overview/mannual/java-sdk/reference-manual/config/">Configuration item reference manual</a></p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-17 - Parameter value format error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/17/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/17/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The attribute configuration value is too long, generally set within 200 characters.</li> |
| <li>The format of the attribute configuration value is wrong, currently supports numbers, -, _, etc.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the content of the attribute configuration value is too long, and modify it according to the prompt information.</li> |
| <li>Check whether the attribute configuration value contains special characters, such as @#$%^&amp;, etc. For details, please refer to the prompt information to modify.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-18 - Notification registration event failed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/18/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/18/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The notification has been sent, and an unexpected error occurred in the business processing logic.</li> |
| <li>The configuration center cannot be connected, timeout error.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check the custom business logic implementation, whether there is a runtime exception.</li> |
| <li>Check whether the configuration center can be connected normally.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-19 - Embedded ZooKeeper running abnormally</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/19/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/19/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The ZooKeeper service is running abnormally or down.</li> |
| <li>The Zookeeper client version is incompatible with the server startup version and cannot be connected.</li> |
| <li>The connection between the application server and the ZooKeeper service is interrupted.</li> |
| <li>Restricted firewall or third-party protection tools.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check the ZooKeeper service and the health status of the server where it resides.</li> |
| <li>Check whether there is a compatibility problem between the Zookeeper client version and the server startup version, and keep the versions consistent.</li> |
| <li>Check whether the ports of the application server and the ZooKeeper service are unblocked.</li> |
| <li>Check the firewall or third-party protection tool settings to see if it is disabled.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-20 - Error occurred while stopping dubbo module</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/20/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/20/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>Customize the implementation of the destruction method, and there may be exceptions when the business logic is running.</li> |
| <li>The service has not been gracefully stopped, and there may be cases where the business logic has not been processed.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check the custom implementation of the destruction method and business logic.</li> |
| <li>Check whether there is time-consuming business processing logic when the service is stopped.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-21 - An exception occurred when the service was destroyed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/21/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/21/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The service discovery instance has been destroyed</p> |
| <p>Attachment: The current method has been discontinued in version 3.1</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-22 - An error occurred while initializing the registry</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/22/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/22/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <ol> |
| <li>The address configuration of the registration center is wrong.</li> |
| <li>The configured address information cannot be connected through the network normally.</li> |
| <li>The version of the configuration center client does not match the version of the actual server, and there is a compatibility exception.</li> |
| </ol> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <ol> |
| <li>Check whether the configured address is correct.</li> |
| <li>Check whether the network is smooth and can be connected through a third-party client.</li> |
| <li>Check whether there is a compatibility matching problem, you can refer to the third-party website for version adaptation.</li> |
| </ol> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-23 - Waiting for export/reference service exception</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/23/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/23/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>When exporting/referencing services, the registration center stops abnormally or fails to provide normal services externally.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check whether the registration center can be connected normally, and check whether the current client version is compatible with the server.</p> |
| <p>Attachment: The exception is handled in the export/quote method, and theoretically this exception will not be thrown.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-24 - An exception occurred while asynchronously waiting for the reference service</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/24/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/24/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The registration center stops abnormally or cannot provide normal services to the outside world.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check whether the registration center can be connected normally, and check whether the current client version is compatible with the server.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-25 - Undefined exception from custom implementation</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/25/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/25/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The custom implemented <code>org.apache.dubbo.rpc.Protocol</code> protocol has a business logic exception when the method calls destroy.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the <code>destory</code> method of the custom implementation class code.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-26 - Metadata Exported</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/26/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/26/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>Metadata has been exported in the current JVM.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-27 - Inner class API is misused</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/27/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/27/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p><code>org.apache.dubbo.config.ReferenceConfig</code> and <code>org.apache.dubbo.common.config.ReferenceCache</code> may be defined as non-singleton mode.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check custom annotations or configurations, define the core application class as a non-singleton mode, check <code>scope</code> configuration.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-28 - No available annotation found</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/28/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/28/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>No reliable annotations were found under the scan package configuration. Mainly <code>@DubboService</code> or <code>@Service</code></p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the current version, <code>@Service</code> annotation will be scanned before 2.7.7, and <code>@DubboService</code> after that</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-29 - Scan package not configured</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/29/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/29/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p><code>@EnableDubbo.scanBasePackages</code> annotation parameter value is not configured</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p><code>@EnableDubbo.scanBasePackages</code> can be configured.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-30 - Duplicate bean definition</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/30/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/30/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>Duplicate object id or name declared.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>According to the fully qualified class name output by the console, the name can only be modified to be unique.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-31 - Status Check Error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/31/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/31/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>Currently running server status, system CPU usage is too high or memory and other indicators are too low</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the memory usage status of the current server, and other indicators such as CPU usage, there may be a danger of downtime.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-32 - Apollo disconnected with an error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/32/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/32/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The Apollo Config Center may be down or disconnected from the network.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check the service status of the Apollo server and whether the network can communicate normally.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-33 - An exception occurred in the Apollo configuration update event</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/33/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/33/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The Apollo configuration API is used incorrectly.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Please refer to the description about Apollo in the Dynamic Configuration Center Documentation.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-34 - NACOS Error</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/34/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/34/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>NACOS configuration API usage error.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Please refer to the description about NACOS in the Dynamic Configuration Center Documentation.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-35 - Container initialization failed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/35/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/35/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The <code>org.apache.dubbo.container.Container</code> SPI implementation of the undefined interface.</p> |
| <p>P.S. It is currently tested and used in <code>org.apache.dubbo.container.Main</code> class.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-36 - An error occurred during filter validation</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/36/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/36/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>The <code>invoke</code> method rewritten in the custom filter extension class has a business code exception.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>You can use some third-party tools or <code>jstack [PID] &gt; jstack.log</code> to analyze the stack information and locate it.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-37 - An error occurred in the processing of dynamic configuration monitoring</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/37/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/37/</guid><description> |
| <p>When the file changes, the listening event processing fails</p> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>File permissions changed or directory permissions changed.</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>The code can be located according to the stack information of the console.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-38 - Configuration parameter undefined</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/38/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/38/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>configuration parameter is undefined</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>It is mostly used in test cases, and parameters can be set according to the prompt details.</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-39 - An error occurred in the Dubbo configuration bean initializer</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/39/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/39/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>source code or modified</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check that the business code does not modify the source code or load sequence of the core class. |
| Such as: org.apache.dubbo.config.spring.context.DubboConfigBeanInitializer</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-40 - Dubbo configuration bean not found</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/40/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/40/</guid><description> |
| <h2 id="possible-reason">Possible Reason</h2> |
| <p>source code or modified</p> |
| <h2 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h2> |
| <p>Check that the business code does not modify the source code or load sequence of the core class. |
| Such as: org.apache.dubbo.config.spring.context.DubboConfigBeanInitializer</p> |
| <p style="margin-top: 3rem;"> </p></description></item><item><title>Docs3-V2: 5-41 - Failed to read SSL certificate</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/41/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/41/</guid><description> |
| <h3 id="possible-reason">possible reason</h3> |
| <p>SSL certificate configuration exception</p> |
| <h3 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h3> |
| <p>Check the configuration of the SSL certificate to see if the corresponding file exists</p></description></item><item><title>Docs3-V2: 5-42 - Dubbo certificate issuance failed</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/42/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/42/</guid><description> |
| <h3 id="possible-reason">possible reason</h3> |
| <p>Dubbo failed to request the remote CA to issue a certificate</p> |
| <h3 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h3> |
| <ul> |
| <li>Check CA connection configuration</li> |
| <li>Check CA health status</li> |
| <li>Check CA logs</li> |
| </ul></description></item><item><title>Docs3-V2: 5-43 - Dubbo certificate signing connection is not secure</title><link>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/43/</link><pubDate>Mon, 01 Jan 0001 00:00:00 +0000</pubDate><guid>https://dubbo.apache.org/en/docs3-v2/java-sdk/faq/5/43/</guid><description> |
| <h3 id="possible-reason">possible reason</h3> |
| <p>Dubbo&rsquo;s connection to remote CA is not secure</p> |
| <h3 id="troubleshooting-and-resolution-steps">Troubleshooting and resolution steps</h3> |
| <ul> |
| <li>Check whether the Dubbo process has correctly configured the CA certificate information and the Token acquisition method of OIDC (OpenID Connect)</li> |
| </ul></description></item></channel></rss> |
