Failed to initialize compiler: object java.lang.Object in compiler mirror not found

Question

On Ubuntu 16.04, I installed scala:

$ls ~/Binary/scala-2.11.8
bin  doc  lib  man
$grep -A 2 SCALA ~/.bashrc
SCALA=~/Binary/scala-2.11.8
SBT=~/Binary/sbt
export PATH=$PATH:$SCALA/bin:$SBT/bin

With openjdk8 installed, scala fails when opening the REPL:

$javac -version
javac 1.8.0_91
$ 
$scala
Welcome to Scala 2.11.8 (OpenJDK 64-Bit Server VM, Java 9-internal).
Type in expressions for evaluation. Or try :help.
scala> 
Failed to initialize compiler: object java.lang.Object in compiler mirror not found.
** Note that as of 2.8 scala does not assume use of the java classpath.
** For the old behavior pass -usejavacp to scala, or if using a Settings
** object programmatically, settings.usejavacp.value = true.

Failed to initialize compiler: object java.lang.Object in compiler mirror not found.
** Note that as of 2.8 scala does not assume use of the java classpath.
** For the old behavior pass -usejavacp to scala, or if using a Settings
** object programmatically, settings.usejavacp.value = true.

How can I resolve it?

It's not set. But, I fixed it by `sudo update-alternatives --config javac` to use openjdk-8 rather than `/usr/lib/jvm/java-9-openjdk-amd64/bin/java`. — Kevin Meredith, Jul 27 '16 at 03:02
I had the same problem, and changing the java version to 8 made the trick. — lilloraffa, Jan 05 '17 at 20:41

score 40 · Accepted Answer · answered Jan 10 '17 at 03:54

40

Using the Java 8 version of OpenJDK resolved this issue for me.

sudo update-alternatives --config java
sudo update-alternatives --config javac

answered Jan 10 '17 at 03:54

WOPR

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installing specific java version on osx with brew: https://www.lonecpluspluscoder.com/2017/10/08/installing-other-versions-of-the-java-jdk-via-homebrew/ – polo Oct 11 '17 at 18:02
Very Helpful answer! – Praveen Kumar K S Jan 30 '18 at 10:20
This is a linux question, but if you are having this issue on a Mac, follow these instructions to install Java8 in your system (https://stackoverflow.com/questions/24342886/how-to-install-java-8-on-mac), and set your new JAVA_HOME accordingly (see @Dbz answer below). – Rick Mar 03 '18 at 19:42
I was using Java 10, and downgrading to version 8 of OpenJDK indeed worked! However, I also had to update the JAVA_HOME environment variable to the proper folder for it to work, in case anyone needs to do this as well. – anaotha Oct 04 '18 at 13:58
Using the Java 8 version worked for me on Ubuntu without any further change. Great answer – randombee Jan 10 '19 at 19:47
As mentioned, downgrade to legacy software is an bad option. This is not an correct answer. Only option is to update scala and sbt – judovana Aug 03 '20 at 13:29

score 15 · Answer 2 · answered Feb 07 '20 at 17:12

15

Java 8 is deprecated, so downgrading to is must NOT be an acceptable solution.

The correct solution is to upgrade your SBT to 0.13.17 or higher.

answered Feb 07 '20 at 17:12

silverberry

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The only correct answer out of 8 others, and zero upvotes! – Adam Williams Feb 23 '20 at 21:53

score 10 · Answer 3 · answered Feb 08 '18 at 23:48

This issue appears to be with Java 9 and gets solved with Java 8.

If you have Java 8 and Java 9, and you would like to keep both, you can set your environment variable JAVA_HOME to the Java 8 path.

For example:

export JAVA_HOME=/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home

You will need to replace jdk1.8.0_161.jdk with whichever version of the JDK that you have.

You can find that version with:

ls /Library/Java/JavaVirtualMachines/

Once you set that environment variable, you can open a new terminal and run java -version to see if the version was set correctly.

EDIT:

It may be worth noting that I have a Mac even though this is a linux question.

score 6 · Answer 4 · answered Oct 01 '17 at 21:24

6

Installing java version "1.8.0_144" resolved the issue for me. I had installed jdk 1.9 previously.

answered Oct 01 '17 at 21:24

Yash P Shah

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cstroe · Answer 5 · 2021-12-08T03:26:53.480

If you're using an older version of Scala that is not compatible with JDK greater than 8, update to a newer version that's compatible with JDK 11. JDK 11 is current the LTS.

Versions by minor version:

For 2.11.x this means 2.11.12 or later
For 2.12.x this means 2.12.10 or later
For 2.13.x this means 2.13.1 or later

As other answers mentioned, make sure you're also using a build tool that's compatible with JDK >8 (e.g. sbt greater than 0.13.17).

score 2 · Answer 6 · answered Jun 15 '18 at 04:05

2

Installing Java 8 resolved this issue.

I downloaded java 8 and i extracted that to the following location : /usr/lib/jvm/jdk1.8.0_172

After doing this update the JAVA_HOME path to the same : /usr/lib/jvm/jdk1.8.0_172

This will resolve the issue.

answered Jun 15 '18 at 04:05

S.P.

185
19

score 1 · Answer 7 · answered Oct 07 '17 at 19:24

1

Worked with this java version "1.8.0_144"

Uninstall java and apache-spark

install java, install apache-spark

answered Oct 07 '17 at 19:24

Anthony Awuley

3,455
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score -1 · Answer 8 · edited Aug 30 '18 at 21:21

-1

I ran into the same issue. Uninstall Java 9

sudo rm -fr /Library/Java/JavaVirtualMachines/jdk-9.jdk/
sudo rm -fr /Library/Internet\ Plug-Ins/JavaAppletPlugin.plugin
sudo rm -fr /Library/PreferencePanes/JavaControlPanel.prefPane

Ref: https://gist.github.com/schnell18/bcb9833f725be22f6acd01f94b486392

Install Java 8.

Everything seems to good now.

Btw: this was for mac. Might be useful for you.

edited Aug 30 '18 at 21:21

Michael Mior

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answered Jun 02 '18 at 14:57

Murali Bala

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score -2 · Answer 9 · edited Aug 05 '19 at 05:44

-2

i had a zip of my jdk at the same location. Removing the zip did the trick for me.

edited Aug 05 '19 at 05:44

cs95

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answered Jul 30 '19 at 07:14

user7392763

1
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Failed to initialize compiler: object java.lang.Object in compiler mirror not found

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