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rednaxelafx/command_prompt

Created December 23, 2011 03:43
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get class histogram in GC log on OutOfMemoryError
Raw
command_prompt
$ cat > OOM.java
import java.util.*;
public class OOM {
public static void main(String[] args) throws Exception {
ArrayList list = new ArrayList();
while (true) { list.add(new byte[20000]); }
}
}
$ javac OOM.java
$ java -XX:OnOutOfMemoryError='kill -3 %p' -XX:+PrintClassHistogram -Xmx10m -Xloggc:/tmp/gc.log OOM
#
# java.lang.OutOfMemoryError: Java heap space
# -XX:OnOutOfMemoryError="kill -3 %p"
# Executing /bin/sh -c "kill -3 15353"...
2011-12-23 11:09:48
Full thread dump OpenJDK 64-Bit Server VM (22.0-b02-internal-fastdebug mixed mode):
"Low Memory Detector" daemon prio=10 tid=0x0000000056eff800 nid=0x3c05 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
JavaThread state: _thread_blocked
Thread: 0x0000000056eff800 [0x3c05] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
"C2 CompilerThread1" daemon prio=10 tid=0x0000000056efd000 nid=0x3c04 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
JavaThread state: _thread_blocked
Thread: 0x0000000056efd000 [0x3c04] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
"C2 CompilerThread0" daemon prio=10 tid=0x0000000056ee8800 nid=0x3c03 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
JavaThread state: _thread_blocked
Thread: 0x0000000056ee8800 [0x3c03] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
"Signal Dispatcher" daemon prio=10 tid=0x0000000056ee6000 nid=0x3c02 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
JavaThread state: _thread_blocked
Thread: 0x0000000056ee6000 [0x3c02] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
"Finalizer" daemon prio=10 tid=0x0000000056e63000 nid=0x3c01 in Object.wait() [0x00000000423bf000]
java.lang.Thread.State: WAITING (on object monitor)
JavaThread state: _thread_blocked
Thread: 0x0000000056e63000 [0x3c01] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000ffaa32e8> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:118)
- locked <0x00000000ffaa32e8> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:134)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)
"Reference Handler" daemon prio=10 tid=0x0000000056e60800 nid=0x3c00 in Object.wait() [0x00000000422be000]
java.lang.Thread.State: WAITING (on object monitor)
JavaThread state: _thread_blocked
Thread: 0x0000000056e60800 [0x3c00] State: _at_safepoint _has_called_back 0 _at_poll_safepoint 0
JavaThread state: _thread_blocked
at java.lang.Object.wait(Native Method)
- waiting on <0x00000000ffaa3490> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:485)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
- locked <0x00000000ffaa3490> (a java.lang.ref.Reference$Lock)
"main" prio=10 tid=0x0000000056d8f000 nid=0x3bfa runnable [0x0000000040a41000]
java.lang.Thread.State: RUNNABLE
JavaThread state: _thread_blocked
Thread: 0x0000000056d8f000 [0x3bfa] State: _call_back _has_called_back 1 _at_poll_safepoint 0
JavaThread state: _thread_blocked
at oom.main(oom.java:6)
"VM Thread" prio=10 tid=0x0000000056e46800 nid=0x3bff runnable
"GC task thread#0 (ParallelGC)" prio=10 tid=0x0000000056da7800 nid=0x3bfb runnable
"GC task thread#1 (ParallelGC)" prio=10 tid=0x0000000056da9800 nid=0x3bfc runnable
"GC task thread#2 (ParallelGC)" prio=10 tid=0x0000000056dab800 nid=0x3bfd runnable
"GC task thread#3 (ParallelGC)" prio=10 tid=0x0000000056dad800 nid=0x3bfe runnable
"VM Periodic Task Thread" prio=10 tid=0x0000000056f03800 nid=0x3c06 waiting on condition
Compiler thread printing unimplemented.
JNI global references: 92
Heap
PSYoungGen total 3008K, used 2621K [0x00000000ffcb0000, 0x0000000100000000, 0x0000000100000000)
eden space 2624K, 99% used [0x00000000ffcb0000,0x00000000fff3f7d0,0x00000000fff40000)
from space 384K, 0% used [0x00000000fffa0000,0x00000000fffa0000,0x0000000100000000)
to space 384K, 0% used [0x00000000fff40000,0x00000000fff40000,0x00000000fffa0000)
PSOldGen total 6848K, used 6836K [0x00000000ff600000, 0x00000000ffcb0000, 0x00000000ffcb0000)
object space 6848K, 99% used [0x00000000ff600000,0x00000000ffcad2a0,0x00000000ffcb0000)
PSPermGen total 21248K, used 2143K [0x00000000fa400000, 0x00000000fb8c0000, 0x00000000ff600000)
object space 21248K, 10% used [0x00000000fa400000,0x00000000fa617de0,0x00000000fb8c0000)
Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
at oom.main(oom.java:6)
$ cat /tmp/gc.log
0.347: [GC 2610K->2554K(9856K), 0.0082460 secs]
0.358: [GC 5171K->5045K(9856K), 0.0074010 secs]
0.366: [Full GC 5045K->5036K(9856K), 0.0175010 secs]
0.385: [Full GC 7655K->7637K(9856K), 0.0184070 secs]
0.404: [Full GC 9448K->9448K(9856K), 0.0163090 secs]
0.421: [Full GC 9448K->9399K(9856K), 0.0204180 secs]
0.442: [Full GC 9447K->9447K(9856K), 0.0157920 secs]
0.458: [Full GC 9447K->9439K(9856K), 0.0143060 secs]
0.472: [Full GC 9458K->9458K(9856K), 0.0143570 secs]
0.487: [Full GC 9458K->9458K(9856K), 0.0140480 secs]
0.536: [Full GC 9458K->190K(8448K), 0.0316810 secs]
num #instances #bytes class name
----------------------------------------------
1: 4696 643360 <methodKlass>
2: 4696 576088 <constMethodKlass>
3: 310 352176 <constantPoolKlass>
4: 282 243552 <constantPoolCacheKlass>
5: 310 221808 <instanceKlassKlass>
6: 376 73904 [B
7: 740 67528 [C
8: 367 44432 java.lang.Class
9: 489 31840 [[I
10: 453 29032 [S
11: 741 23712 java.lang.String
12: 40 23360 <objArrayKlassKlass>
13: 355 18720 [I
14: 310 13104 [Ljava.lang.Object;
15: 8 4672 <typeArrayKlassKlass>
16: 11 2112 <klassKlass>
17: 58 1856 java.util.Hashtable$Entry
18: 48 1792 [Ljava.lang.String;
19: 17 1360 [Ljava.util.HashMap$Entry;
20: 15 720 java.util.HashMap
21: 7 720 [Ljava.util.Hashtable$Entry;
22: 11 704 java.net.URL
23: 16 640 java.util.concurrent.ConcurrentHashMap$Segment
24: 19 608 java.util.concurrent.ConcurrentHashMap$HashEntry
25: 19 608 java.util.Locale
26: 15 600 java.util.LinkedHashMap$Entry
27: 5 560 java.lang.Thread
28: 16 512 java.util.concurrent.locks.ReentrantLock$NonfairSync
29: 14 448 java.util.HashMap$Entry
30: 11 440 java.lang.ref.SoftReference
31: 5 440 java.lang.reflect.Method
32: 6 432 java.lang.reflect.Constructor
33: 16 416 [Ljava.util.concurrent.ConcurrentHashMap$HashEntry;
34: 10 400 java.io.ObjectStreamField
35: 13 312 java.io.ExpiringCache$Entry
36: 9 288 java.security.AccessControlContext
37: 1 288 <methodDataKlass>
38: 6 288 java.util.Hashtable
39: 12 264 [Ljava.lang.Class;
40: 8 256 java.lang.OutOfMemoryError
41: 15 240 java.lang.Object
42: 6 192 java.util.Vector
43: 8 184 [Ljava.io.ObjectStreamField;
44: 7 168 java.io.File
45: 4 160 java.lang.ref.Finalizer
46: 2 160 [Ljava.lang.ThreadLocal$ThreadLocalMap$Entry;
47: 4 160 sun.misc.URLClassPath$JarLoader
48: 5 120 java.util.ArrayList
49: 2 112 sun.nio.cs.StreamEncoder
50: 2 112 java.io.ExpiringCache$1
51: 1 112 java.lang.ref.Reference$ReferenceHandler
52: 1 112 java.lang.ref.Finalizer$FinalizerThread
53: 4 96 sun.misc.MetaIndex
54: 2 96 java.io.BufferedWriter
55: 2 96 java.nio.HeapByteBuffer
56: 3 96 java.util.Stack
57: 2 96 sun.nio.cs.UTF_8$Encoder
58: 3 96 java.lang.ThreadLocal$ThreadLocalMap$Entry
59: 2 96 java.lang.ThreadGroup
60: 2 80 java.io.ExpiringCache
61: 1 80 [Ljava.util.concurrent.ConcurrentHashMap$Segment;
62: 5 80 java.lang.ThreadLocal
63: 1 80 sun.misc.Launcher$ExtClassLoader
64: 3 72 sun.reflect.NativeConstructorAccessorImpl
65: 3 72 sun.misc.Signal
66: 1 72 sun.misc.Launcher$AppClassLoader
67: 3 72 java.lang.RuntimePermission
68: 3 72 java.io.FileDescriptor
69: 2 64 java.io.FileOutputStream
70: 2 64 java.lang.VirtualMachineError
71: 2 64 java.security.Permissions
72: 2 64 [Ljava.lang.Thread;
73: 2 64 java.io.PrintStream
74: 4 64 java.util.concurrent.atomic.AtomicInteger
75: 2 64 sun.misc.URLClassPath
76: 2 64 java.lang.ref.ReferenceQueue
77: 2 64 java.io.OutputStreamWriter
78: 2 64 java.lang.ref.ReferenceQueue$Null
79: 4 64 java.lang.ref.ReferenceQueue$Lock
80: 1 48 [J
81: 3 48 sun.reflect.DelegatingConstructorAccessorImpl
82: 2 48 java.nio.charset.CoderResult
83: 1 48 java.util.concurrent.ConcurrentHashMap
84: 2 48 sun.misc.NativeSignalHandler
85: 1 48 java.util.Properties
86: 2 48 java.lang.ThreadLocal$ThreadLocalMap
87: 3 48 java.lang.Integer
88: 2 48 java.io.BufferedOutputStream
89: 3 48 java.nio.charset.CodingErrorAction
90: 2 40 [Ljava.io.File;
91: 1 40 java.io.BufferedInputStream
92: 1 40 sun.nio.cs.StandardCharsets$Aliases
93: 1 40 sun.nio.cs.StandardCharsets$Classes
94: 1 40 sun.nio.cs.StandardCharsets$Cache
95: 1 40 java.security.ProtectionDomain
96: 1 32 java.lang.NullPointerException
97: 1 32 java.lang.ArithmeticException
98: 1 32 [Ljava.lang.OutOfMemoryError;
99: 1 32 java.util.Collections$SynchronizedMap
100: 1 32 java.security.BasicPermissionCollection
101: 1 32 java.io.FilePermission
102: 1 32 sun.nio.cs.StandardCharsets
103: 1 32 java.lang.ref.Reference
104: 1 32 java.io.UnixFileSystem
105: 1 32 java.util.concurrent.atomic.AtomicReferenceFieldUpdater$AtomicReferenceFieldUpdaterImpl
106: 1 32 [Ljava.lang.ThreadGroup;
107: 2 32 java.util.HashSet
108: 1 32 java.security.CodeSource
109: 2 32 sun.net.www.protocol.jar.Handler
110: 2 32 java.lang.Boolean
111: 1 32 java.lang.ClassLoader$NativeLibrary
112: 1 32 sun.misc.SoftCache
113: 1 32 java.io.FileInputStream
114: 2 32 java.nio.ByteOrder
115: 1 24 java.util.Collections$EmptyMap
116: 1 24 sun.nio.cs.UTF_8
117: 1 24 sun.misc.URLClassPath$FileLoader
118: 1 24 java.lang.reflect.ReflectPermission
119: 1 24 java.util.BitSet
120: 1 24 java.security.Policy$UnsupportedEmptyCollection
121: 1 24 java.io.FilePermissionCollection
122: 1 16 java.io.FileDescriptor$1
123: 1 16 java.lang.reflect.ReflectAccess
124: 1 16 java.util.Collections$ReverseComparator
125: 1 16 java.security.ProtectionDomain$2
126: 1 16 java.lang.Terminator$1
127: 1 16 java.security.ProtectionDomain$Key
128: 1 16 sun.jkernel.DownloadManager$1
129: 1 16 [Ljava.security.Principal;
130: 1 16 sun.net.www.protocol.file.Handler
131: 1 16 java.nio.charset.CoderResult$1
132: 1 16 java.lang.String$CaseInsensitiveComparator
133: 1 16 java.nio.charset.CoderResult$2
134: 1 16 java.security.AccessControlContext$1
135: 1 16 [Ljava.lang.StackTraceElement;
136: 1 16 sun.misc.Launcher
137: 1 16 sun.reflect.ReflectionFactory
138: 1 16 java.lang.System$2
139: 1 16 java.lang.ref.Reference$Lock
140: 1 16 [Ljava.security.cert.Certificate;
141: 1 16 sun.misc.Launcher$Factory
142: 1 16 java.util.Collections$EmptySet
143: 1 16 java.lang.Runtime
144: 1 16 java.util.Hashtable$EmptyEnumerator
145: 1 16 java.util.Hashtable$EmptyIterator
146: 1 16 java.net.URLClassLoader$7
147: 1 16 java.util.Collections$EmptyList
148: 1 16 sun.misc.Unsafe
149: 1 16 java.net.UnknownContentHandler
Total 14749 2390184
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