Date: Mon, 04 Feb 2013 19:00:18 +0200 From: Achilleas Mantzios <achill@matrix.gatewaynet.com> To: freebsd-java@freebsd.org Subject: Re: Re: Re: Re: Re: FreeBSD pl/java problem : backend hangs Message-ID: <1917151.YiRb4P31Ma@smadev.internal.net> In-Reply-To: <3454957.mdnJNsQM6V@smadev.internal.net> References: <5933829.WYzpjKtO0p@smadev.internal.net> <1794514.P32sUeWV4B@smadev.internal.net> <3454957.mdnJNsQM6V@smadev.internal.net>
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It surely is a problem with running JNI from within postgresql in FreeB=
SD :
Wrote a very small C postgresql function which simply calls JNI
and it hangs as well.
#include "postgres.h"
=20
#include "utils/elog.h"
#include "utils/palloc.h"
#include "utils/array.h"
#include "utils/builtins.h"
#include "storage/bufpage.h"
#include "catalog/pg_type.h"
#include <jni.h>
PG_MODULE_MAGIC;
PG_FUNCTION_INFO_V1(jnitest);
Datum jnitest(PG_FUNCTION_ARGS);
Datum
jnitest(PG_FUNCTION_ARGS)
{
int res;
JNIEnv *env;
JavaVM *jvm;
JavaVMInitArgs vm_args;
JavaVMOption *options=3DNULL;
vm_args.version =3D 0x00010002;
vm_args.options =3D options;
vm_args.nOptions =3D 0;
vm_args.ignoreUnrecognized =3D JNI_TRUE;
/* Create the Java VM */
res =3D JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);
PG_RETURN_POINTER(res);
}
create function jnitest() RETURNS integer LANGUAGE c AS '$libdir/jnites=
t', 'jnitest';
dynacom=3D# select jnitest();
^^^ hangs, it seems the call to res =3D JNI_CreateJavaVM(&jvm, (void**)=
&env, &vm_args);
just never completes
So, this must be a FreeBSD/PostgreSQL/JNI thing.
Any help/where to go from here would be very welcome.
On =CE=94=CE=B5=CF=85 04 =CE=A6=CE=B5=CE=B2 2013 17:48:20 Achilleas Man=
tzios wrote:
> It seems that it gets hung in JNI_CreateJavaVM.
>=20
> I can write and run standalone JNI programs outside postgrsesql (even=
as postgres user),
> but when i try to run it from within postgres, then it gets hang.
>=20
> Any ideas?
>=20
> On =CE=94=CE=B5=CF=85 04 =CE=A6=CE=B5=CE=B2 2013 17:16:27 Achilleas M=
antzios wrote:
> > I am thinking of trying to address this problem twofold :
> >=20
> > 1) establish a connection with the pl/java people
> > 2) trying to go back and forth from there and here to try to debug =
the problem
> >=20
> > Lets wait for some recommendation/help from there, and then i'll ge=
t back
> > to this list for more.
> >=20
> > On =CE=94=CE=B5=CF=85 04 =CE=A6=CE=B5=CE=B2 2013 16:09:56 Achilleas=
Mantzios wrote:
> > > Thanx Ronald,
> > >=20
> > > postgres@smadev:~> jstack 384
> > > 384: Unable to open socket file: target process not responding or=
HotSpot VM not loaded
> > > The -F option can be used when the target process is not respondi=
ng
> > >=20
> > > Also jstack -F fails as well
> > > postgres@smadev:~> jstack -F 384
> > > Attaching to process ID 384, please wait...
> > > Exception in thread "main" java.lang.reflect.InvocationTargetExce=
ption
> > > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Me=
thod)
> > > at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMeth=
odAccessorImpl.java:57)
> > > at sun.reflect.DelegatingMethodAccessorImpl.invoke(Delega=
tingMethodAccessorImpl.java:43)
> > > at java.lang.reflect.Method.invoke(Method.java:616)
> > > at sun.tools.jstack.JStack.runJStackTool(JStack.java:136)=
> > > at sun.tools.jstack.JStack.main(JStack.java:102)
> > > Caused by: sun.jvm.hotspot.debugger.UnalignedAddressException: Tr=
ying to read at address: 0x746f705c6c4f4867 with alignment: 4
> > > at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal$1.checkA=
lignment(BsdDebuggerLocal.java:181)
> > > at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.readCInt=
eger(BsdDebuggerLocal.java:478)
> > > at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue=
(DebuggerBase.java:454)
> > > at sun.jvm.hotspot.debugger.bsd.BsdDebuggerLocal.readAddr=
ess(BsdDebuggerLocal.java:423)
> > > at sun.jvm.hotspot.debugger.bsd.BsdAddress.getAddressAt(B=
sdAddress.java:74)
> > > at sun.jvm.hotspot.HotSpotTypeDataBase.readVMTypes(HotSpo=
tTypeDataBase.java:108)
> > > at sun.jvm.hotspot.HotSpotTypeDataBase.<init>(HotSpotType=
DataBase.java:85)
> > > at sun.jvm.hotspot.bugspot.BugSpotAgent.setupVM(BugSpotAg=
ent.java:574)
> > > at sun.jvm.hotspot.bugspot.BugSpotAgent.go(BugSpotAgent.j=
ava:495)
> > > at sun.jvm.hotspot.bugspot.BugSpotAgent.attach(BugSpotAge=
nt.java:333)
> > > at sun.jvm.hotspot.tools.Tool.start(Tool.java:163)
> > > at sun.jvm.hotspot.tools.JStack.main(JStack.java:86)
> > >=20
> > >=20
> > > On =C3=8E=C2=94=C3=8E=C2=B5=C3=8F=C2=85 04 =C3=8E=C2=A6=C3=8E=C2=B5=
=C3=8E=C2=B2 2013 14:47:13 you wrote:
> > > > I have no experience running java as a backend of pgsql.
> > > > Can you run jstack on the backend?
> > > >=20
> > > > Ronald.
> > > >=20
> > > > On Mon, 04 Feb 2013 14:17:22 +0100, Achilleas Mantzios =20
> > > > <achill@matrix.gatewaynet.com> wrote:
> > > >=20
> > > > > Hello community,
> > > > >
> > > > > I am running postgresql 9.2.2 with
> > > > > openjdk version "1.6.0_32"
> > > > > OpenJDK Runtime Environment (build 1.6.0_32-b25)
> > > > > OpenJDK 64-Bit Server VM (build 20.0-b12, mixed mode)
> > > > > On FreeBSD 8.3-RELEASE
> > > > >
> > > > > I am having trouble even running simple tests like :
> > > > > CREATE FUNCTION getsysprop(VARCHAR)
> > > > > RETURNS VARCHAR
> > > > > AS 'java.lang.System.getProperty'
> > > > > LANGUAGE java;
> > > > >
> > > > > SELECT getsysprop('user.home');
> > > > >
> > > > > When i do that, the session hangs, and have to kill -9 the ba=
ckend.
> > > > >
> > > > > Searching with truss got :
> > > > >
> > > > > gettimeofday({1359983241.596250 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596275 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596300 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596327 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596352 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596378 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596403 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596431 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596458 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596482 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596507 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596532 },0x0) =3D 0 (0x0)
> > > > > gettimeofday({1359983241.596556 },0x0) =3D 0 (0x0)
> > > > > _umtx_op(0x7fffffffc7e8,0x3,0x1,0x0,0x0,0x1) =3D 0 (0x0)
> > > > > sigprocmask(SIG_BLOCK,SIGHUP|SIGINT|SIGQUIT|SIGABRT|SIGEMT|SI=
GKILL|SIGSYS|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIG=
CHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|S=
IGINFO|SIGUSR1|SIGUSR2,0x0) =20
> > > > > =3D 0 (0x0)
> > > > > sigprocmask(SIG_SETMASK,0x0,0x0) =3D 0 (0x0)
> > > > > sigprocmask(SIG_BLOCK,SIGHUP|SIGINT|SIGQUIT|SIGABRT|SIGEMT|SI=
GKILL|SIGSYS|SIGPIPE|SIGALRM|SIGTERM|SIGURG|SIGSTOP|SIGTSTP|SIGCONT|SIG=
CHLD|SIGTTIN|SIGTTOU|SIGIO|SIGXCPU|SIGXFSZ|SIGVTALRM|SIGPROF|SIGWINCH|S=
IGINFO|SIGUSR1|SIGUSR2,0x0) =20
> > > > > =3D 0 (0x0)
> > > > > sigprocmask(SIG_SETMASK,0x0,0x0) =3D 0 (0x0)
> > > > >
> > > > > while ktrace gave :
> > > > >
> > > > > 98910 initial thread CALL gettimeofday(0x7fffffffc900,0)
> > > > > 98910 initial thread RET gettimeofday 0
> > > > > 98910 initial thread CALL gettimeofday(0x7fffffffc900,0)
> > > > > 98910 initial thread RET gettimeofday 0
> > > > > 98910 initial thread CALL gettimeofday(0x7fffffffc900,0)
> > > > > 98910 initial thread RET gettimeofday 0
> > > > > 98910 initial thread CALL gettimeofday(0x7fffffffc900,0)
> > > > > 98910 initial thread RET gettimeofday 0
> > > > > 98910 initial thread CALL gettimeofday(0x7fffffffc940,0)
> > > > > 98910 initial thread RET gettimeofday 0
> > > > > 98910 initial thread CALL _umtx_op(0x7fffffffc7e8,0x3,0x1,0=
,0)
> > > > > 98910 initial thread RET _umtx_op 0
> > > > > 98910 initial thread CALL =20
> > > > > sigprocmask(SIG_BLOCK,0x7fffffffc780,0x8016167d8)
> > > > > 98910 initial thread RET sigprocmask 0
> > > > > 98910 initial thread CALL sigprocmask(SIG_SETMASK,0x8016167=
d8,0)
> > > > > 98910 initial thread RET sigprocmask 0
> > > > > 98910 initial thread CALL =20
> > > > > sigprocmask(SIG_BLOCK,0x7fffffffc6e0,0x8016167d8)
> > > > > 98910 initial thread RET sigprocmask 0
> > > > > 98910 initial thread CALL sigprocmask(SIG_SETMASK,0x8016167=
d8,0)
> > > > > 98910 initial thread RET sigprocmask 0
> > > > > 98910 initial thread CALL _umtx_op(0x8f8dc4280,0x11,0,0,0)
> > > > >
> > > > > I found some relevant problems with FreeBSD systems hanging a=
fter an =20
> > > > > _umtx_op but all those point
> > > > > to threading problems that now are solved. I found nothing mo=
dern about =20
> > > > > _umtx_op.
> > > > >
> > > > > I know FreeBSD is not a "Tier-1" platform for postgresql (nor=
java), but =20
> > > > > this is my main platform and i'd like
> > > > > to stick with this.
> > > > >
> > > > > Is there anything i could do to get closer to make pl/java wo=
rk with =20
> > > > > FreeBSD?
> > > > >
> > > > > Also read this =20
> > > > > http://postgresql.1045698.n5.nabble.com/Java-VM-stalls-during=
-quot-install-jar-quot-td3290754.html =20
> > > > > thread.
> > > > > Very close to my situation. JNI standalone also worked for me=
.
> > > > >
> > > > > Any hints/pointers ?
> > > > >
> > > > > -
> > > > > Achilleas Mantzios
> > > > > IT DEV
> > > > > IT DEPT
> > > > > Dynacom Tankers Mgmt
> > > > > _______________________________________________
> > > > > freebsd-java@freebsd.org mailing list
> > > > > http://lists.freebsd.org/mailman/listinfo/freebsd-java
> > > > > To unsubscribe, send any mail to "freebsd-java-unsubscribe@fr=
eebsd.org"
> > > -
> > > Achilleas Mantzios
> > > IT DEV
> > > IT DEPT
> > > Dynacom Tankers Mgmt
> > > _______________________________________________
> > > freebsd-java@freebsd.org mailing list
> > > http://lists.freebsd.org/mailman/listinfo/freebsd-java
> > > To unsubscribe, send any mail to "freebsd-java-unsubscribe@freebs=
d.org"
> > -
> > Achilleas Mantzios
> > IT DEV
> > IT DEPT
> > Dynacom Tankers Mgmt
> -
> Achilleas Mantzios
> IT DEV
> IT DEPT
> _______________________________________________
> freebsd-java@freebsd.org mailing list
> http://lists.freebsd.org/mailman/listinfo/freebsd-java
> To unsubscribe, send any mail to "freebsd-java-unsubscribe@freebsd.or=
g"
-
Achilleas Mantzios
IT DEV
IT DEPT
Dynacom Tankers Mgmt
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