Deploying Presto¶

This page presents common problems encountered when deploying Presto.

Permission denied for launcher.pid¶

Problem

Running bin/launcher run or bin/launcher start returns the following error:

Permission denied: '/private/var/presto/data/var/run/launcher.pid'

Solution

Run the command as root or using sudo:

sudo bin/launcher run
sudo bin/launcher start

Xcode failed to locate Python¶

Problem

Running bin/launcher run or bin/launcher start returns the following error:

xcode select failed to locate python requesting installation of command

Solution

Create a symlink where XCode looks for python that links to python3. An example of such a command:

ln -s /Library/Developer/CommandLineTools/usr/bin/python3 /Library/Developer/CommandLineTools/usr/bin/python

JVM option ‘UseG1GC’ is experimental¶

Problem

Running bin/launcher run or bin/launcher start returns the following error:

 Error: VM option 'UseG1GC' is experimental and must be enabled via -XX:+UnlockExperimentalVM Options.

 Error: Could not create the Java Virtual Machine.

 Error: A fatal exception has occurred. Program will exit.

Solution

This error occurs with some versions of Java.

Ensure installed Java version meets the Requirements.