FileSystemNotFoundException: Provider "gs" not installed

[lordcoste]

Hi, I'm getting this error on app engine standard java11:

java.nio.file.FileSystemNotFoundException: Provider "gs" not installed
    at java.base/java.nio.file.Path.of(Path.java:212)
    at java.base/java.nio.file.Paths.get(Paths.java:97)

Is there anything else I should do besides adding the dependency in the pom?

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-nio</artifactId>
  <version>0.122.13</version>
</dependency>

Best regards

[cojenco]

Hi @lordcoste, thanks for filing the question. The google-cloud-nio artifact ships a scheme handler for gs URI. We do recommend deferring to libraries-bom for the version as is shown in the first sample here. If you can try that out, and see if you still run into the exception.

[lordcoste]

Hi @cojenco, thanks for you help. I've tried also with BOM but I've got the same error. If it can help to debug the issue: if I extract the resulting jar after building it with maven, I can see the BOOT-INF/lib/google-cloud-nio-0.122.13.jar

I'm not an expert java dev, I'm just trying to port an existing springboot microservice to google cloud. Right now everything is working (for example: com.google.cloud.sql) except the storage. Is there anything else I can try?

[averikitsch]

Hi @lordcoste , it looks like the conventional Spring boot packaging here isn't packaging the dependency in the needed way. Usually you'll see something like:

<plugin>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-maven-plugin</artifactId>
    <version>2.4.5</version>
    <executions>
        <execution>
            <goals>
                <goal>repackage</goal>
            </goals>
        </execution>
    </executions>
</plugin>

However, for the "gs" provider to be accessible it needs to be in the 'lib/' folder. You can package it manually by copying the dependencies and then creating the JAR (this is based on the springboot-helloworld sample:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-dependency-plugin</artifactId>
  <executions>
      <execution>
          <id>copy-dependencies</id>
          <phase>prepare-package</phase>
          <goals>
              <goal>copy-dependencies</goal>
          </goals>
          <configuration>
              <outputDirectory>
                  ${project.build.directory}/lib
              </outputDirectory>
          </configuration>
      </execution>
  </executions>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<configuration>
    <archive>
        <manifest>
            <addClasspath>true</addClasspath>
            <classpathPrefix>lib/</classpathPrefix>
            <mainClass>
              com.example.appengine.springboot.SpringbootApplication
            </mainClass>
        </manifest>
    </archive>
</configuration>
</plugin>

[cojenco]

Hope this helps, @lordcoste. Please reopen if this is still an issue.