JVM crash on grabber.stop() method

[4714407]

When I set grabber's ImageMode to FrameGrabber.ImageMode.RAW, the JVM crashes when I call the stop method.
The code looks like this

FFmpegFrameGrabber grabber = new FFmpegFrameGrabber(url);
grabber.setImageMode(FrameGrabber.ImageMode.RAW);
grabber.start();
 while((frame = grabber.grabImage()) != null){
                count++;
            }
 grabber.stop();

Drop this line "Comment it out grabber.setImageMode ( FrameGrabber.ImageMode.RAW ); "
Everything is OK

[4714407]

Tracking code found that the exception is caused by avcodec_free_context(video_c);

[saudet]

Please send a pull request to fix this! Thanks

[4714407]

I don't know how to fix this problem. That's why I put this bug to you

[4714407]

A fatal error has been detected by the Java Runtime Environment:

EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007fff43bc935d, pid=2208, tid=0x0000000000000d68

JRE version: Java(TM) SE Runtime Environment (8.0_231-b11) (build 1.8.0_231-b11)

Java VM: Java HotSpot(TM) 64-Bit Server VM (25.231-b11 mixed mode windows-amd64 compressed oops)

Problematic frame:

C [msvcrt.dll+0x1935d]

Failed to write core dump. Minidumps are not enabled by default on client versions of Windows

If you would like to submit a bug report, please visit:

http://bugreport.java.com/bugreport/crash.jsp

The crash happened outside the Java Virtual Machine in native code.

See problematic frame for where to report the bug.

--------------- T H R E A D ---------------

Current thread (0x0000000003726000): JavaThread "main" [_thread_in_native, id=3432, stack(0x0000000003120000,0x0000000003220000)]

siginfo: ExceptionCode=0xc0000005, reading address 0x000000001ec0d2f8

Registers:
RAX=0x000000001d6c96c0, RBX=0x000000000321edc8, RCX=0x000000001ec0d300, RDX=0x000000001ec0d300
RSP=0x000000000321ed70, RBP=0x000000000321ef90, RSI=0x000000000321eef8, RDI=0x0000000000000000
R8 =0x000000001eaeb600, R9 =0x0000000000000001, R10=0x000000000000001b, R11=0x000000000321ed40
R12=0x0000000000000000, R13=0x0000000017f190b0, R14=0x000000000321efb0, R15=0x0000000003726000
RIP=0x00007fff43bc935d, EFLAGS=0x0000000000010206

Top of Stack: (sp=0x000000000321ed70)
0x000000000321ed70: 0000000100000023 0000000001970000
0x000000000321ed80: 000000000321ef90 0000000000000000
0x000000000321ed90: 0000000000000000 00007fff27669d7b
0x000000000321eda0: 0000000000000000 00007fff43bc9c9c
0x000000000321edb0: 000000001d45d5c0 000000000321eef8
0x000000000321edc0: 000000001d6c96c0 000000001eaeb600
0x000000000321edd0: 000000001c0e3b40 00007ffee419f3a5
0x000000000321ede0: 0000000000000000 00007fff43bc9c9c
0x000000000321edf0: 000000001d45d5c0 000000000321eef8
0x000000000321ee00: 000000001d45d5c0 00007fff27669829
0x000000000321ee10: 000000001d45d5c0 000000001c0e3b40
0x000000000321ee20: 000000000321ef90 000000001d45d5c0
0x000000000321ee30: 000000000321eef8 000000001c17c980
0x000000000321ee40: 000000000321ef90 00007ffee644617b
0x000000000321ee50: 0000000003726000 000000000321eec0
0x000000000321ee60: 0000000017f190b0 0000000003726000

Instructions: (pc=0x00007fff43bc935d)
0x00007fff43bc933d: 48 83 c4 28 c3 cc cc cc cc cc cc cc cc cc cc cc
0x00007fff43bc934d: cc cc cc 48 83 ec 28 48 85 c9 74 0d 48 83 e1 f8
0x00007fff43bc935d: 48 8b 49 f8 e8 1a 09 00 00 48 83 c4 28 c3 cc cc
0x00007fff43bc936d: cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc

Register to memory mapping:

RAX=0x000000001d6c96c0 is an unknown value
RBX=0x000000000321edc8 is pointing into the stack for thread: 0x0000000003726000
RCX=0x000000001ec0d300 is an unknown value
RDX=0x000000001ec0d300 is an unknown value
RSP=0x000000000321ed70 is pointing into the stack for thread: 0x0000000003726000
RBP=0x000000000321ef90 is pointing into the stack for thread: 0x0000000003726000
RSI=0x000000000321eef8 is pointing into the stack for thread: 0x0000000003726000
RDI=0x0000000000000000 is an unknown value
R8 =0x000000001eaeb600 is an unknown value
R9 =0x0000000000000001 is an unknown value
R10=0x000000000000001b is an unknown value
R11=0x000000000321ed40 is pointing into the stack for thread: 0x0000000003726000
R12=0x0000000000000000 is an unknown value
R13=0x0000000017f190b0 is pointing into metadata
R14=0x000000000321efb0 is pointing into the stack for thread: 0x0000000003726000
R15=0x0000000003726000 is a thread

Stack: [0x0000000003120000,0x0000000003220000], sp=0x000000000321ed70, free space=1019k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [msvcrt.dll+0x1935d]
C [avutil-56.dll+0x9d7b]
C [avcodec-58.dll+0x17f3a5]
C [avutil-56.dll+0x9829]
C [avcodec-58.dll+0x242617b]
C [avcodec-58.dll+0x51a509]
C [jniavcodec.dll+0x44bc6]
C 0x0000000003838c67

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j org.bytedeco.ffmpeg.global.avcodec.avcodec_free_context(Lorg/bytedeco/ffmpeg/avcodec/AVCodecContext;)V+0
j org.bytedeco.javacv.FFmpegFrameGrabber.releaseUnsafe()V+189
j org.bytedeco.javacv.FFmpegFrameGrabber.release()V+6
j org.bytedeco.javacv.FFmpegFrameGrabber.stop()V+1
j net.weborld.Grabber.saveImage(Ljava/lang/String;J)V+257
j net.weborld.Grabber.main([Ljava/lang/String;)V+9
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x000000001ac52800 JavaThread "JavaCPP Deallocator" daemon [_thread_blocked, id=7260, stack(0x000000001bcd0000,0x000000001bdd0000)]
0x0000000019a8e800 JavaThread "Service Thread" daemon [_thread_blocked, id=14672, stack(0x000000001a890000,0x000000001a990000)]
0x0000000019a81000 JavaThread "C1 CompilerThread2" daemon [_thread_blocked, id=1284, stack(0x000000001a790000,0x000000001a890000)]
0x0000000019a32800 JavaThread "C2 CompilerThread1" daemon [_thread_blocked, id=15144, stack(0x0000000019e90000,0x0000000019f90000)]
0x0000000019a2f800 JavaThread "C2 CompilerThread0" daemon [_thread_blocked, id=12992, stack(0x0000000019d90000,0x0000000019e90000)]
0x0000000019a64000 JavaThread "Monitor Ctrl-Break" daemon [_thread_in_native, id=14772, stack(0x0000000019c90000,0x0000000019d90000)]
0x00000000196d2800 JavaThread "Attach Listener" daemon [_thread_blocked, id=7844, stack(0x0000000019b90000,0x0000000019c90000)]
0x0000000018354800 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=12216, stack(0x0000000019a90000,0x0000000019b90000)]
0x000000000381a800 JavaThread "Finalizer" daemon [_thread_blocked, id=4256, stack(0x0000000019590000,0x0000000019690000)]
0x000000001832a000 JavaThread "Reference Handler" daemon [_thread_blocked, id=9192, stack(0x0000000019490000,0x0000000019590000)]
=>0x0000000003726000 JavaThread "main" [_thread_in_native, id=3432, stack(0x0000000003120000,0x0000000003220000)]

Other Threads:
0x0000000018307800 VMThread [stack: 0x0000000019390000,0x0000000019490000] [id=14800]
0x000000001a070000 WatcherThread [stack: 0x000000001a990000,0x000000001aa90000] [id=9320]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

heap address: 0x0000000081e00000, size: 2018 MB, Compressed Oops mode: 32-bit
Narrow klass base: 0x0000000000000000, Narrow klass shift: 3
Compressed class space size: 1073741824 Address: 0x0000000100000000

Heap:
PSYoungGen total 34304K, used 19172K [0x00000000d5f80000, 0x00000000d8500000, 0x0000000100000000)
eden space 32256K, 53% used [0x00000000d5f80000,0x00000000d7063160,0x00000000d7f00000)
from space 2048K, 91% used [0x00000000d8300000,0x00000000d84d6010,0x00000000d8500000)
to space 2560K, 0% used [0x00000000d8000000,0x00000000d8000000,0x00000000d8280000)
ParOldGen total 87552K, used 48K [0x0000000081e00000, 0x0000000087380000, 0x00000000d5f80000)
object space 87552K, 0% used [0x0000000081e00000,0x0000000081e0c000,0x0000000087380000)
Metaspace used 7490K, capacity 7618K, committed 7808K, reserved 1056768K
class space used 823K, capacity 851K, committed 896K, reserved 1048576K

Card table byte_map: [0x0000000012be0000,0x0000000012fe0000] byte_map_base: 0x00000000127d1000

Marking Bits: (ParMarkBitMap*) 0x0000000057246d90
Begin Bits: [0x0000000013690000, 0x0000000015618000)
End Bits: [0x0000000015618000, 0x00000000175a0000)

Polling page: 0x0000000001880000

CodeCache: size=245760Kb used=5075Kb max_used=5075Kb free=240684Kb
bounds [0x0000000003820000, 0x0000000003d20000, 0x0000000012820000]
total_blobs=1305 nmethods=967 adapters=251
compilation: enabled

Compilation events (10 events):
Event: 26.779 Thread 0x0000000019a2f800 963 4 java.nio.ByteBuffer:: (45 bytes)
Event: 26.783 Thread 0x0000000019a2f800 nmethod 963 0x0000000003d084d0 code [0x0000000003d08620, 0x0000000003d08838]
Event: 27.702 Thread 0x0000000019a32800 964 4 java.nio.DirectByteBuffer:: (24 bytes)
Event: 27.703 Thread 0x0000000019a32800 nmethod 964 0x0000000003d08150 code [0x0000000003d08280, 0x0000000003d08358]
Event: 27.950 Thread 0x0000000019a2f800 965 4 org.bytedeco.javacv.FFmpegFrameGrabber::processImage (508 bytes)
Event: 27.972 Thread 0x0000000019a2f800 nmethod 965 0x0000000003d12bd0 code [0x0000000003d12e80, 0x0000000003d13b88]
Event: 28.053 Thread 0x0000000019a32800 966 4 org.bytedeco.javacv.FFmpegFrameGrabber::grabImage (10 bytes)
Event: 28.054 Thread 0x0000000019a32800 nmethod 966 0x0000000003d07e50 code [0x0000000003d07fa0, 0x0000000003d08028]
Event: 172.368 Thread 0x0000000019a81000 967 % ! 3 net.weborld.Grabber::saveImage @ 187 (278 bytes)
Event: 172.375 Thread 0x0000000019a81000 nmethod 967% 0x0000000003d14b50 code [0x0000000003d15200, 0x0000000003d19428]

[saudet]

Ok, I've fixed that in commit d6afac0. Thanks for reporting!

[4714407]

Everything is OK. What resources do I need to release manually in RAM mode?

[saudet]

As long as you call close()/stop() everything should get released.

[saudet]

The fix has been released with JavaCV 1.5.5! Enjoy