Memory allocation failed - OS: Ubuntu 18.04.2 LTS on Windows 10

[incube8r]

When trying to configure an app on Ubuntu 18.04 on Windows error occurs:

# curl -X PUT [email protected] '127.0.0.1:8443/config/'   
{ 
        "error": "Memory allocation failed."
}

OS: Ubuntu 18.04.2 LTS on Windows 10
Kernel: 4.4.0-17763-Microsoft

[VBart]

Thank you for the report. Could you please check, what's in the unit.log?

[incube8r]

@VBart after the curl put the log appends this:

2019/05/29 13:42:01 [alert] 33#33 *4 memfd_create(/unit.33.fb8f291) failed (38: Function not implemented)

[VBart]

@incube8r So the problem is that Microsoft WSL implementation of Linux API incomplete.
You can try to avoid this issue by recompiling Unit with disabled memfd_create() syscall:
./configure --cc-opt='-DNXT_HAVE_MEMFD_CREATE=0'

[incube8r]

I did:

$ ./configure java --module=java8
configuring Java module
checking for java executable found /usr/bin/java
openjdk version "1.8.0_212"
OpenJDK Runtime Environment (build 1.8.0_212-8u212-b03-0ubuntu1.18.04.1-b03)
OpenJDK 64-Bit Server VM (build 25.212-b03, mixed mode)
checking java.home /usr/lib/jvm/java-8-openjdk-amd64/jre
adjust java.home /usr/lib/jvm/java-8-openjdk-amd64
checking library path /usr/lib/jvm/java-8-openjdk-amd64/jre/lib/amd64/server
checking for JNI ... found
 + Java module: java8.unit.so

Then

make

Then when I do

$ curl -X PUT [email protected] '127.0.0.1:8443/config/'
{ 
        "error": "Invalid configuration.",
        "detail": "The module to run \"java 8\" is not found among the available application modules."
}

I won't run java

What could be missing here?

[mar0x]

Please provide all commands you are using to configure/make/run unit.
If you running unit from packages, it is better to use pre-built java module.

[VBart]

@incube8r You have to make install your module into the modules directory. You can check the modules directory path by running unitd --help command.

[incube8r]

@VBart thanks, I can confirm here that using the ./configure --cc-opt='-DNXT_HAVE_MEMFD_CREATE=0'

I was able to run a Java web app with NGINX on Ubuntu 18.04 on Windows 10