Java запускается очень медленно в AIX7.1
AIX 64bit, 7G RAM
$ uname -a
AIX server3 1 7 00036073D600
$ java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build pap6460_26sr1-20111114_01(SR1))
IBM J9 VM (build 2.6, JRE 1.6.0 AIX ppc64-64 20111113_94967 (JIT enabled, AOT enabled)
J9VM - R26_Java626_SR1_20111113_1649_B94967
JIT - r11_20111028_21230
GC - R26_Java626_SR1_20111113_1649_B94967
J9CL - 20111113_94967)
JCL - 20111112_01
$ time /opt/IBM/WebSphere/AppServer/java/bin/java
...
real 0m40.62s
user 0m0.43s
sys 0m0.04s
Для запуска команды java без какого-либо приложения требуется 40 секунд. JRE (64-разрядная версия )является частью WebSphere V8 и требует 20 мин. для запуска сервера приложений.
В той же AIX есть другая JRE (32bit ), она работает очень хорошо.
$ /usr/java6/bin/java -version
java version "1.6.0"
Java(TM) SE Runtime Environment (build pap3260sr9fp2-20110627_03(SR9 FP2))
IBM J9 VM (build 2.4, JRE 1.6.0 IBM J9 2.4 AIX ppc-32 jvmap3260sr9-20110624_85526 (JIT enabled, AOT enabled)
J9VM - 20110624_085526
JIT - r9_20101028_17488ifx17
GC - 20101027_AA)
JCL - 20110530_01
$ time /usr/java6/bin/java
real 0m0.70s
user 0m0.64s
sys 0m0.05s
Я нашел кое-что, используя truss. Когда java собирается запускаться, он блокируется в потоке _tsleep ()в течение длительного времени. Почему? Как это исправить?
kopen("/etc/irs.conf", O_RDONLY) Err#2 ENOENT
_thread_self() = 26738737
getdomainname(0x09001000A00E44F8, 1024) = 0
_thread_self() = 26738737
_thread_self() = 26738737
_thread_self() = 26738737
getdomainname(0x09001000A00E44F8, 1024) = 0
_thread_self() = 26738737
_thread_self() = 26738737
_thread_self() = 26738737
kopen("/etc/hesiod.conf", O_RDONLY) Err#2 ENOENT
_thread_self() = 26738737
getdomainname(0x09001000A00E44F8, 1024) = 0
_thread_self() = 26738737
_thread_self() = 26738737
_thread_self() = 26738737
getdomainname(0x09001000A00E44F8, 1024) = 0
_thread_self() = 26738737
_thread_self() = 26738737
_thread_self() = 26738737
getdomainname(0x09001000A00E44F8, 1024) = 0
_thread_self() = 26738737
_thread_self() = 26738737
socket(2, 2, 0) = 4
getsockopt(4, 65535, 4104, 0x000001001012A934, 0x000001001012A930) = 0
connext(4, 0x00000100103F37B8, 16) = 0
_esend(4, 0x000001001012B860, 40, 0, 0x0000000000000000) = 40
_poll(0x000001001012AA00, 1, 5000) = 1
_enrecvfrom(4, 0x000001001012CBB0, 1024, 0, 0x000001001012B1C0, 0x000001001012A9E8, 0x0000000000000000) = 56
close(4) = 0
socket(2, 2, 0) = 4
getsockopt(4, 65535, 4104, 0x000001001012A934, 0x000001001012A930) = 0
connext(4, 0x00000100103F37B8, 16) = 0
_esend(4, 0x000001001012B860, 40, 0, 0x0000000000000000) = 40
_poll(0x000001001012AA00, 1, 5000) = 1
_enrecvfrom(4, 0x000001001012CBB0, 1024, 0, 0x000001001012B1C0, 0x000001001012A9E8, 0x0000000000000000) = 94
_esend(4, 0x000001001012B860, 25, 0, 0x0000000000000000) = 25
_poll(0x000001001012AA00, 1, 5000) = 1
_enrecvfrom(4, 0x000001001012CBB0, 1024, 0, 0x000001001012B1C0, 0x000001001012A9E8, 0x0000000000000000) = 25
close(4) = 0
socket(2, 2, 0) = 4
_esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F37C8, 16, 0x0000000000000000) = 25
thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
_poll(0x000001001012AA00, 1, 5000) = 0
close(4) = 0
socket(2, 2, 0) = 4
_esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F37C8, 16, 0x0000000000000000) = 25
thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
_poll(0x000001001012AA00, 1, 5000) = 0
close(4) = 0
socket(2, 2, 0) = 4
_esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F37C8, 16, 0x0000000000000000) = 25
thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
_poll(0x000001001012AA00, 1, 10000) = 0
close(4) = 0
socket(2, 2, 0) = 4
_esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F37C8, 16, 0x0000000000000000) = 25
thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
_poll(0x000001001012AA00, 1, 20000) = 0
close(4) = 0
getdomainname(0x000001001012CD10, 256) = 0
kopen("/etc/hosts", O_RDONLY) = 4
kioctl(4, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
kfcntl(4, F_SETFD, 0x0000000000000001) = 0
kioctl(4, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
kread(0x0000000000000004, 0x0000010010416538, 0x0000000000001000) = 0x00000000000007B0
0x00000000: " # = = = = = = = = = ="..
kread(0x0000000000000004, 0x0000010010416538, 0x0000000000001000) = 0x0000000000000000
0x00000000: " # = = = = = = = = = ="..
close(4) = 0
__libc_sbrk(0x0000000000020020) = 0x0000010010421C20
с отметкой времени
1.8662: socket(2, 2, 0) = 4
1.8666: _esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F38A8, 16, 0x0000000000000000) = 25
3.8671: thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
1.8669: _poll(0x000001001012AA00, 1, 5000) = 0
6.8705: close(4) = 0
6.8710: socket(2, 2, 0) = 4
6.8715: _esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F38A8, 16, 0x0000000000000000) = 25
8.8723: thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
6.8720: _poll(0x000001001012AA00, 1, 5000) = 0
11.8726: close(4) = 0
11.8729: socket(2, 2, 0) = 4
11.8732: _esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F38A8, 16, 0x0000000000000000) = 25
13.8738: thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
11.8736: _poll(0x000001001012AA00, 1, 10000) = 0
21.8741: close(4) = 0
21.8744: socket(2, 2, 0) = 4
21.8748: _esendto(4, 0x000001001012B860, 25, 0, 0x00000100103F38A8, 16, 0x0000000000000000) = 25
23.8754: thread_tsleep(0, 0x09001000A030F400, 0x0000000000000000, 0x0000000000000000) (sleeping...)
21.8752: _poll(0x000001001012AA00, 1, 20000) = 0
41.8756: close(4) = 0
41.8760: getdomainname(0x000001001012CD10, 256) = 0
41.8763: kopen("/etc/hosts", O_RDONLY) = 4
41.8767: kioctl(4, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
41.8770: kfcntl(4, F_SETFD, 0x0000000000000001) = 0
41.8773: kioctl(4, 22528, 0x0000000000000000, 0x0000000000000000) Err#25 ENOTTY
kread(0x0000000000000004, 0x0000010010416618, 0x0000000000001000) = 0x00000000000007B0
0x00000000: " # = = = = = = = = = ="..
kread(0x0000000000000004, 0x0000010010416618, 0x0000000000001000) = 0x0000000000000000
0x00000000: " # = = = = = = = = = ="..
41.8782: close(4) = 0
tp
Quit in sem_wait at 0x9000000002632d8 ($t3)
0x9000000002632d8 (sem_wait+0x98) e8410028 ld r2,0x28(r1)
thread state-k wchan state-u k-tid mode held scope function
>$t1 run blocked 31391751 u no sys _event_sleep
_event_sleep(??, ??, ??, ??, ??, ??) at 0x9000000008365c4
_event_wait(??, ??) at 0x900000000837064
_cond_wait_local(??, ??, ??) at 0x90000000084521c
_cond_wait(??, ??, ??) at 0x900000000845808
pthread_join(??, ??) at 0x90000000082d2b0
unnamed block in ContinueInNewThread(continuation = 0x6c6f636b6c002e66, stack_size = 7310577395057127012, args = 0x5f6f72002e666574), line 2286 in "java_md.c"
ContinueInNewThread(continuation = 0x6c6f636b6c002e66, stack_size = 7310577395057127012, args = 0x5f6f72002e666574), line 2286 in "java_md.c"
unnamed block in main(argc = 0, argv = 0x000001001000c178), line 532 in "java.c"
main(argc = 0, argv = 0x000001001000c178), line 532 in "java.c"
thread state-k wchan state-u k-tid mode held scope function
>$t2 run running 54329549 u no sys __fd_poll
__fd_poll(??, ??, ??) at 0x90000000012c0d4
res_send.poll(??, ??, ??) at 0x9000000001021ac
res_nsend(0x100103f37a8, 0x1001012b860, 0x1900000019, 0x1001012cbb0, 0x40000000400) at 0x9000000001011d4
res_nquery(??, ??, ??, ??, ??, ??) at 0x90000000012b5d8
res_nquerydomain(??, ??, ??, ??, ??, ??, ??) at 0x90000000012ab14
res_nsearch(??, ??, ??, ??, ??, ??) at 0x90000000012af08
res_search(??, ??, ??, ??, ??) at 0x900000000107b50
dns_ho.ho_byname2(??, ??, ??) at 0x90000000013a384
gen_ho.ho_byname2(??, ??, ??) at 0x900000000163888
gethostbyname2(??, ??) at 0x9000000001060ec
getaddrinfo2(??, ??, ??, ??, ??) at 0x900000000102ba0
getaddrinfo(??, ??, ??, ??) at 0x900000000104d34
j9sock_getaddrinfo() at 0x9000000053caad8
populateRASNetData() at 0x900000005347fc0
VMInitStages() at 0x9000000053086b0
runJ9VMDllMain() at 0x90000000530bb9c
pool.pool_do() at 0x9000000052f29c8
runInitializationStage() at 0x90000000530b890
protectedInitializeJavaVM() at 0x900000005306478
j9sig_protect() at 0x9000000053a2b9c
initializeJavaVM() at 0x90000000530585c
jniinv.JNI_CreateJavaVM() at 0x90000000530ea14
jvm.JNI_CreateJavaVM() at 0x900000000ccc510
redirector.JNI_CreateJavaVM() at 0x900000000cb5574
InitializeJVM(pvm = (nil), penv = (nil), ifn = (nil)), line 1801 in "java.c"
main(argc = 0, argv = (nil)), line 810 in "java.c"
thread state-k wchan state-u k-tid mode held scope function
>$t3 run running 52887625 k no sys sem_wait
sem_wait(??) at 0x9000000002632d8
asynchSignalReporter() at 0x9000000053a3dcc
thread_wrapper() at 0x900000000d00ad0
!!!! ThreadDump Completed- detached from debugger !!!!
Обновление
Я нашел эту тему и протестировал программу на своем AIX. При использовании имени хоста он задерживался примерно на 40 секунд для DNS-запроса. IP-адрес нормальный.
Java не может разрешить DNS-адрес из AIX :UnknownHostException
Кстати, имя хоста показывает server3, когда я пингую имя, оно показывает :PING server3.cf1.xx.xxxx.com..... Запускаю программу через server3.cf1.xx.xxxx.com, задержки нет.
Update2:
Проблема с IPV6. Если я добавлю -Djava.net.preferIPv4Stack=true, Java-приложение будет работать хорошо. Но команда java по-прежнему использует IPV6 для запроса DNS. Таким образом, java-команда имеет задержку 40 с, а java-приложение не имеет задержки в DNS-запросе.
Можно ли установить в AIX в качестве протокола по умолчанию протокол IPV4, а не параметр java?
8
задан Community 23 May 2017 в 12:14
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