bitcoinj: Cannot find symbol 'sun.misc.Cleaner' on MacOS/Java 9

I followed the instructions for a full build but I got a compilation error. MacOS 10.13.1 Java version: 9.0.1 Apache Maven 3.5.2 git clone …bitcoinj mvn clean package

Here’s the relevant output:

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.2:compile (default-compile) on project bitcoinj-core: Compilation failure
[ERROR] [snipped]/bitcoinj/core/src/main/java/org/bitcoinj/store/WindowsMMapHack.java:[36,9] cannot find symbol
[ERROR]   symbol:   class Cleaner
[ERROR]   location: class org.bitcoinj.store.WindowsMMapHack

About this issue

Original URL
State: closed
Created 7 years ago
Comments: 17 (11 by maintainers)

Most upvoted comments

Can you try Java 8? Seems like the sun.misc.Cleaner class was removed.

schildbach on Nov 8, 2017

That’s right. The test Oscar mentioned was merged.

schildbach on Apr 24, 2020

Thanks @dbkingsb, that article was really useful. I installed JDK 8 and changed my ~/.mavenrc:

$ /usr/libexec/java_home -V
Matching Java Virtual Machines (2):
    9.0.1, x86_64:	"Java SE 9.0.1"	/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home
    1.8.0_151, x86_64:	"Java SE 8"	/Library/Java/JavaVirtualMachines/jdk1.8.0_151.jdk/Contents/Home

/Library/Java/JavaVirtualMachines/jdk-9.0.1.jdk/Contents/Home

$ cat ~/.mavenrc
JAVA_HOME=`/usr/libexec/java_home -v 1.8.0_151`

wallet-tool builds now.

tompreston on Dec 27, 2017