[MRELEASE-1014] Deadlock when doing a "git commit" in release:prepare

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Pending Closed
• Affects Version/s: 2.5.3
• Component/s: prepare
• Environment: macOS Mojave, Oracle Java 1.8.0_181, Maven 3.5.4
• Assignee: Robert Scholte
• Reporter: Roland Huss
• Created: 26/Sep/18 09:22
• Updated: 03/Apr/21 09:15
• Resolved: 03/Apr/21 09:15

Description

When doing a "mvn release:prepare" with

Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T20:33:14+02:00)
Maven home: /Users/roland/.sdkman/candidates/maven/current
Java version: 1.8.0_181, vendor: Oracle Corporation, runtime: /Library/Java/JavaVirtualMachines/jdk1.8.0_181.jdk/Contents/Home/jre
Default locale: en_DE, platform encoding: US-ASCII
OS name: "mac os x", version: "10.14", arch: "x86_64", family: "mac"

then Mavn hangs with a deadlock at

[INFO] Working directory: /Users/roland/Development/x/docker-maven-plugin
[WARNING] Ignoring unrecognized line: ?? pom.xml.releaseBackup
[WARNING] Ignoring unrecognized line: ?? release.properties
[INFO] Executing: /bin/sh -c cd /Users/roland/Development/x/docker-maven-plugin && git commit --verbose -F /var/folders/cs/gzp3xf6j6vn_tfzftszdcq6c0000gn/T/maven-scm-1472096174.commit pom.xml
[INFO] Working directory: /Users/roland/Development/x/docker-maven-plugin

with the following thread dump

Full thread dump Java HotSpot(TM) 64-Bit Server VM (25.181-b13 mixed mode):

"Thread-15" #32 prio=5 os_prio=31 tid=0x00007f85b42a4000 nid=0xa61b runnable [0x0000700007f3e000]
   java.lang.Thread.State: RUNNABLE
	at java.io.FileInputStream.readBytes(Native Method)
	at java.io.FileInputStream.read(FileInputStream.java:255)
	at java.io.BufferedInputStream.read1(BufferedInputStream.java:284)
	at java.io.BufferedInputStream.read(BufferedInputStream.java:345)
	- locked <0x000000076cf6fc48> (a java.lang.UNIXProcess$ProcessPipeInputStream)
	at sun.nio.cs.StreamDecoder.readBytes(StreamDecoder.java:284)
	at sun.nio.cs.StreamDecoder.implRead(StreamDecoder.java:326)
	at sun.nio.cs.StreamDecoder.read(StreamDecoder.java:178)
	- locked <0x000000076cf74da0> (a java.io.InputStreamReader)
	at java.io.InputStreamReader.read(InputStreamReader.java:184)
	at java.io.BufferedReader.fill(BufferedReader.java:161)
	at java.io.BufferedReader.readLine(BufferedReader.java:324)
	- locked <0x000000076cf74da0> (a java.io.InputStreamReader)
	at java.io.BufferedReader.readLine(BufferedReader.java:389)
	at org.codehaus.plexus.util.cli.StreamPumper.run(StreamPumper.java:129)

"process reaper" #12 daemon prio=10 os_prio=31 tid=0x00007f85b40aa800 nid=0xa903 waiting for monitor entry [0x0000700007d38000]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at java.lang.UNIXProcess$ProcessPipeInputStream.processExited(UNIXProcess.java:527)
	- waiting to lock <0x000000076cf6fc48> (a java.lang.UNIXProcess$ProcessPipeInputStream)
	at java.lang.UNIXProcess.lambda$initStreams$3(UNIXProcess.java:301)
	at java.lang.UNIXProcess$$Lambda$8/443348849.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
...

This is very likely related to the JDK issue https://bugs.openjdk.java.net/browse/JDK-8169565
with the difference that this deadlock happens for me for each run, reproducably.