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Retrieving Information about your Container

How do I get the logs for my WebViewer Server?

These logs are on the container in /usr/local/apache-tomcat/logs, you can copy them from the container by finding the ID of the container and then calling copy on the container's log directory.

If you are using docker-compose

docker-compose logs 2>&1 | tee out.log
docker ps ## get container ID
docker cp container_id:/usr/local/apache-tomcat/logs ./mylogs

If you are using only docker

docker ps ## get container ID
docker logs <container id> 2>&1 | tee out.log

If you are using the Windows installer, the logs are present at /<install directory>/apache-tomcat/logs.

How do I find the version of WebViewer Server?

If you refer to the logs, it should be present there as an entry:

INFO: {"PDFNet_version":8.0172545,"num_cpu":8,"os_arch":"amd64","os_name":"Linux","os_version":"5.2.14-arch2-1-ARCH","server_version":"1.4.0","total_memory":481.5}

If you cannot see the start of the logs, you can also go to the demo application on the server at server-link/demo?s and select the Server Info button to see the version.

My server crashed, what information is useful?

On Linux

  • The logs retrieved from docker-compose logs as described above.
  • The marker files at /usr/local/apache-tomcat/internal/Markers/*
docker cp <container id> /usr/local/apache-tomcat/internal_data/Markers ./
  • hs_err_pid files from within the container if available, at the path /usr/local/apache-tomcat
docker cp <container id> /usr/local/apache-tomcat/hs_err_pid* ./
  • A way to reproduce the issue if possible

If your container has shut down, it is possible to start it back up by finding its ID and calling docker start on it. To view shutdown containers and start them, do the following:

docker ps -a
docker start <container id>

On Windows

  • The logs at:


  • The marker files at `install_dir/internal/Markers/*
  • hs_err_pid files from within the container if available, at the path /usr/local/apache-tomcat
  • A way to reproduce the issue if possible

Crash Collection on AWS

WebViewer Server as of 1.5.7 supports an automated crash collection system that will make reporting issues to our team easier. To use it, set the following variables in your docker-compose or as environment variables:

  • ERROR_REPORTING_S3: 'name of your s3 bucket'
  • AWS_ACCESS_KEY_ID: 'your access key for AWS with access to s3'
  • AWS_SECRET_ACCESS_KEY: 'your secret access key for AWS'
  • AWS_DEFAULT_REGION: 'your aws region'

After adding the following variables, WebViewer Server will zip crash data and upload it to this external bucket. You can then provide us this zip files to investigate your issue. Even without these variables set, a dump zip file will be created inside of /usr/local/apache-tomcat/dumps which you can also provide us.

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