OrientDB "Cannot find a command executor for the command request" 错误

Question

我最初将其作为错误发布在 OrientDB issue tracker 上。但是，我不太确定这是一个错误...

基本上，当我运行来自 IDE 的项目时，一切都很好，所有查询都顺利执行。但是，当我使用 maven-shade-plugin 打包项目时，我开始收到这些 Cannot find a command executor for the command request: 错误，但仅针对一部分查询。在我的 pom.xml 中，我声明如下：

<!-- As defined: http://orientdb.com/docs/last/Graph-Database-Tinkerpop.html  -->
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-core</artifactId>
    <version>${orientdb-version}</version>
</dependency>
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-graphdb</artifactId>
    <version>${orientdb-version}</version>
</dependency>
<dependency>
    <groupId>com.tinkerpop.blueprints</groupId>
    <artifactId>blueprints-core</artifactId>
    <version>2.5.0</version>
</dependency>
<dependency>
     <groupId>net.java.dev.jna</groupId>
     <artifactId>jna-platform</artifactId>
     <version>4.0.0</version>
 </dependency>
 <dependency>
     <groupId>net.java.dev.jna</groupId>
     <artifactId>jna</artifactId>
     <version>4.2.0</version>
 </dependency>
 <dependency>
     <groupId>com.googlecode.concurrentlinkedhashmap</groupId>
     <artifactId>concurrentlinkedhashmap-lru</artifactId>
     <version>1.4.2</version>
 </dependency>
<!-- Include to enable embedded db if user selects single mode -->
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-server</artifactId>
    <version>${orientdb-version}</version>
</dependency>
<!-- Include to enable remote db if user selects distributed mode -->
<dependency>
    <groupId>com.orientechnologies</groupId>
    <artifactId>orientdb-client</artifactId>
    <version>${orientdb-version}</version>
</dependency>
...
<orientdb-version>2.1.3</orientdb-version>

我已将以下过滤器添加到阴影插件以尝试确保没有任何内容被删除，但它似乎没有解决问题：

<filters>
    <filter>
        <artifact>*:*</artifact>
        <includes>
             <include>**</include>
        </includes>
   </filter>
</filters>

堆栈跟踪：

Caused by: com.orientechnologies.orient.core.command.OCommandExecutorNotFoundException: Cannot find a command executor for the command request: sql.CREATE EDGE hasRole FROM (SELECT FROM Person WHERE @rid=#15:0) TO (SELECT FROM Role WHERE @rid=#16:1)
    at com.orientechnologies.orient.core.sql.OCommandExecutorSQLDelegate.parse(OCommandExecutorSQLDelegate.java:72) ~[halo-1.0.0.jar:1.0.0]
    at com.orientechnologies.orient.core.sql.OCommandExecutorSQLDelegate.parse(OCommandExecutorSQLDelegate.java:42) ~[halo-1.0.0.jar:1.0.0]
    at com.orientechnologies.orient.core.storage.impl.local.OAbstractPaginatedStorage.command(OAbstractPaginatedStorage.java:1431) ~[halo-1.0.0.jar:1.0.0]
    at com.orientechnologies.orient.core.command.OCommandRequestTextAbstract.execute(OCommandRequestTextAbstract.java:63) ~[halo-1.0.0.jar:1.0.0]
    at com.tinkerpop.blueprints.impls.orient.OrientGraphCommand.execute(OrientGraphCommand.java:49) ~[halo-1.0.0.jar:1.0.0]
    at co.ff36.halo.core.persistence.Dao.exec(Dao.java:94) ~[halo-1.0.0.jar:1.0.0]
    at co.ff36.halo.core.resource.server.UserRoleServerResource.store(UserRoleServerResource.java:63) ~[halo-1.0.0.jar:1.0.0]
    ... 57 common frames omitted

Answer 1

问题是 maven-shade-plugin 默认不能合并服务文件。 OrientDB 使用 Java 服务以相同的接口注入命令。我想如果你在构建时看到一些日志，你会看到 shade 插件跳过了一些文件，因为它们已经存在。我想你可以通过添加一些合并策略来解决它

https://maven.apache.org/plugins/maven-shade-plugin/examples/resource-transformers.html#ServicesResourceTransformer

OrientDB "Cannot find a command executor for the command request" 错误

OrientDB "Cannot find a command executor for the command request" error

java

maven

orientdb

tinkerpop-blueprint