GCS Hadoop connector error: ClassNotFoundException: com.google.api.client.http.HttpRequestInitializer ls: No FileSystem for scheme gs

Question

I am trying to setup hadoop-connectors on my local Ubuntu 20.04 and running the test command hadoop fs -ls gs://my-bucket but I keep getting errors like the following:

$ hadoop fs -ls gs://my-bucket
2020-08-22 03:29:06,976 WARN fs.FileSystem: Cannot load filesystem: java.util.ServiceConfigurationError: org.apache.hadoop.fs.FileSystem: com.google.cloud.hadoop.fs.gcs.GoogleHadoopFileSystem Unable to get public no-arg constructor
2020-08-22 03:29:06,977 WARN fs.FileSystem: java.lang.NoClassDefFoundError: com/google/api/client/http/HttpRequestInitializer
2020-08-22 03:29:06,977 WARN fs.FileSystem: java.lang.ClassNotFoundException: com.google.api.client.http.HttpRequestInitializer
ls: No FileSystem for scheme "gs"

Note that I can access the bucket using gsutil ls gs://my-bucket .

I have downloaded gcs-connector-hadoop3-latest.jar from here and placed it inside /usr/local/hadoop/share/hadoop/common/lib . I hope this is the right place for this jar file?

I've configured core-site.xml with the properties listed here and also set GOOGLE_APPLICATION_CREDENTIALS to my service account key file. In hadoop-env.sh I've exported

export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64/ 
export HADOOP_CLASSPATH+="$HADOOP_CLASSPATH:$HADOOP_HOME/share/hadoop/common/lib/*.jar:$HADOOP_HOME/lib/*.jar"

Not sure if I've set HADOOP_CLASSPATH correctly and if hadoop recognizes the jar files inside /usr/local/hadoop/share/hadoop/common/lib ? And what is the difference to /usr/local/hadoop/lib ?

Here is the relevant content of core-site.xml :

<configuration>
<property>
  <name>fs.AbstractFileSystem.gs.impl</name>
  <value>com.google.cloud.hadoop.fs.gcs.GoogleHadoopFS</value>
  <description>The AbstractFileSystem for gs: uris.</description>
</property>
<property>
  <name>fs.gs.project.id</name>
  <value>my-project-id</value>
  <description>
    Optional. Google Cloud Project ID with access to GCS buckets.
    Required only for list buckets and create bucket operations.
  </description>
</property>
<property>
  <name>google.cloud.auth.service.account.enable</name>
  <value>true</value>
  <description>
    Whether to use a service account for GCS authorization.
    Setting this property to `false` will disable use of service accounts for
    authentication.
  </description>
</property>
<property>
  <name>google.cloud.auth.service.account.json.keyfile</name>
  <value>/path/to/service-account.json</value>
  <description>
    The JSON key file of the service account used for GCS
    access when google.cloud.auth.service.account.enable is true.
  </description>
</property>
</configuration>

$ java --version
openjdk 11.0.8 2020-07-14
OpenJDK Runtime Environment (build 11.0.8+10-post-Ubuntu-0ubuntu120.04)
OpenJDK 64-Bit Server VM (build 11.0.8+10-post-Ubuntu-0ubuntu120.04, mixed mode, sharing)

$ hadoop version
Hadoop 3.3.0
Source code repository https://gitbox.apache.org/repos/asf/hadoop.git -r aa96f1871bfd858f9bac59cf2a81ec470da649af
Compiled by brahma on 2020-07-06T18:44Z
Compiled with protoc 3.7.1
From source with checksum 5dc29b802d6ccd77b262ef9d04d19c4
This command was run using /usr/local/hadoop/share/hadoop/common/hadoop-common-3.3.0.jar

bashrc:

...

export PDSH_RCMD_TYPE=ssh

export HADOOP_HOME="/usr/local/hadoop"
export PATH=$PATH:$HADOOP_HOME/bin
export PATH=$PATH:$HADOOP_HOME/sbin
export HADOOP_MAPRED_HOME=${HADOOP_HOME}
export HADOOP_COMMON_HOME=${HADOOP_HOME}
export HADOOP_HDFS_HOME=${HADOOP_HOME}
export YARN_HOME=${HADOOP_HOME}

Answer 1

It seems that rebooting helped to solve the issue. After a reboot the command hadoop fs -ls gs://my-bucket works and lists the content of the bucket as expected.

Thanks to @IgorDvorzhak providing the command: hadoop classpath --glob to check if the gcs-connector-hadoop3-latest.jar can be found. I used:

hadoop classpath --glob | grep gcs-connector