Return-Path: Delivered-To: apmail-hadoop-core-user-archive@www.apache.org Received: (qmail 33831 invoked from network); 6 Nov 2008 17:32:40 -0000 Received: from hermes.apache.org (HELO mail.apache.org) (140.211.11.2) by minotaur.apache.org with SMTP; 6 Nov 2008 17:32:40 -0000 Received: (qmail 89654 invoked by uid 500); 6 Nov 2008 17:32:40 -0000 Delivered-To: apmail-hadoop-core-user-archive@hadoop.apache.org Received: (qmail 89610 invoked by uid 500); 6 Nov 2008 17:32:40 -0000 Mailing-List: contact core-user-help@hadoop.apache.org; run by ezmlm Precedence: bulk List-Help: List-Unsubscribe: List-Post: List-Id: Reply-To: core-user@hadoop.apache.org Delivered-To: mailing list core-user@hadoop.apache.org Received: (qmail 89599 invoked by uid 99); 6 Nov 2008 17:32:40 -0000 Received: from athena.apache.org (HELO athena.apache.org) (140.211.11.136) by apache.org (qpsmtpd/0.29) with ESMTP; Thu, 06 Nov 2008 09:32:40 -0800 X-ASF-Spam-Status: No, hits=3.8 required=10.0 tests=HTML_MESSAGE,MIME_QP_LONG_LINE,SPF_PASS X-Spam-Check-By: apache.org Received-SPF: pass (athena.apache.org: local policy) Received: from [76.13.13.75] (HELO n5b.bullet.mail.ac4.yahoo.com) (76.13.13.75) by apache.org (qpsmtpd/0.29) with SMTP; Thu, 06 Nov 2008 17:31:24 +0000 Received: from [76.13.13.25] by n5.bullet.mail.ac4.yahoo.com with NNFMP; 06 Nov 2008 17:30:49 -0000 Received: from [76.13.10.170] by t4.bullet.mail.ac4.yahoo.com with NNFMP; 06 Nov 2008 17:30:49 -0000 Received: from [127.0.0.1] by omp111.mail.ac4.yahoo.com with NNFMP; 06 Nov 2008 17:30:49 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 42465.30165.bm@omp111.mail.ac4.yahoo.com Received: (qmail 85585 invoked by uid 60001); 6 Nov 2008 17:30:43 -0000 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:Date:From:Reply-To:Subject:To:MIME-Version:Content-Type:Message-ID; b=LgkCO6C5oG1u57JS9iUU2Tlr4QMuLMIvZFWU36HHXRsbhm5mnnmHRMYvU4mbAt8NL/q1qYSw+9bkV4o4U0NuMbz4d67ui4Um0fVeOMXauGyGWQ//hWLd6QQdyDIsO8RZsgfm7ja0eH/nNfa03UdwvWqH8kYn0phV0VXsttFljZY=; X-YMail-OSG: .w8V8XIVM1kQg_b7WZPDumVooy.SWEDfy49Xuz56CohkFWP38LR3wlFnILroOsre3UL5eQKM3xAVT_KdhvTQTdpp3ZxwqZfhPf3sDUykLRskZ.eJrREGAiW8L0dg9hIcQr93FgLlzKGUZ3.u1cYdbTEq6T4b Received: from [212.24.187.73] by web59715.mail.ac4.yahoo.com via HTTP; Thu, 06 Nov 2008 09:30:43 PST X-Mailer: YahooMailWebService/0.7.260.1 Date: Thu, 6 Nov 2008 09:30:43 -0800 (PST) From: =?iso-8859-1?Q?Tam=E1s_Szokol?= Reply-To: tamasszokol@yahoo.com Subject: libhdfs SIGSEGV error To: core-user@hadoop.apache.org MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="0-1860757720-1225992643=:82438" Message-ID: <446197.82438.qm@web59715.mail.ac4.yahoo.com> X-Virus-Checked: Checked by ClamAV on apache.org --0-1860757720-1225992643=:82438 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Hello! I'd like to ask your help in a libhdfs related problem. I'm trying to perform HDFS tests from C by using the libhdfs API. I created= a test program, that measures the creation times of 1MB, 10MB, 100MB and 1= GB large files. The test runs well for 1 MB and 10 MB but as soon as I reach to 100MB I rec= eive a SIGSEGV error: =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D # # An unexpected error has been detected by Java Runtime Environment: # #=A0 SIGSEGV (0xb) at pc=3D0x00007fbead12a32c, pid=3D6918, tid=3D1404569383= 62592 # # Java VM: Java HotSpot(TM) 64-Bit Server VM (10.0-b22 mixed mode linux-amd= 64) # Problematic frame: # V=A0 [libjvm.so+0x36d32c] # # If you would like to submit a bug report, please visit: #=A0=A0 http://java.sun.com/webapps/bugreport/crash.jsp # ---------------=A0 T H R E A D=A0 --------------- Current thread (0x0000000000609800):=A0 JavaThread "main" [_thread_in_vm, i= d=3D6918, stack(0x00007fffb5cc2000,0x00007fffb5ec2000)] siginfo:si_signo=3DSIGSEGV: si_errno=3D0, si_code=3D1 (SEGV_MAPERR), si_add= r=3D0x0000000000000000 Registers: RAX=3D0x0000000000000090, RBX=3D0x0000000000609800, RCX=3D0x00007fbead60d1e= 0, RDX=3D0x00007fbead447780 RSP=3D0x00007fffb5ec1240, RBP=3D0x00007fffb5ec12c0, RSI=3D0x000000000000000= 0, RDI=3D0x0000000000609800 R8 =3D0x00007fbe7dcff010, R9 =3D0x0000000000000400, R10=3D0x00007fbead610c5= 0, R11=3D0x00007fbea35180c0 R12=3D0x0000000006300000, R13=3D0x0000000000000000, R14=3D0x000000000000000= 0, R15=3D0x00007fffb5ec1250 RIP=3D0x00007fbead12a32c, EFL=3D0x0000000000010246, CSGSFS=3D0x000000000000= 0033, ERR=3D0x0000000000000004 =A0 TRAPNO=3D0x000000000000000e Top of Stack: (sp=3D0x00007fffb5ec1240) 0x00007fffb5ec1240:=A0=A0 0000000000609998 00007fbe7dcff010 0x00007fffb5ec1250:=A0=A0 0000000000609800 000000000060a1f0 0x00007fffb5ec1260:=A0=A0 0000000000000090 00007fbead447780 0x00007fffb5ec1270:=A0=A0 0000000000609800 0000000000602720 0x00007fffb5ec1280:=A0=A0 0000000000609800 0000000000609998 0x00007fffb5ec1290:=A0=A0 0000000000609800 00007fbe84014220 0x00007fffb5ec12a0:=A0=A0 0000000000609998 00007fbe7dcff010 0x00007fffb5ec12b0:=A0=A0 00000000006f7848 0000000000000000 0x00007fffb5ec12c0:=A0=A0 0000000006300000 00007fbeada9ccff 0x00007fffb5ec12d0:=A0=A0 00000000006f7830 0000000000000000 0x00007fffb5ec12e0:=A0=A0 000000000060a660 0000000000000000 0x00007fffb5ec12f0:=A0=A0 0000000000000000 0000000000000021 0x00007fffb5ec1300:=A0=A0 00007fffb5ec1370 0000000000000000 0x00007fffb5ec1310:=A0=A0 00007fffb5ec14b0 0000000000000000 0x00007fffb5ec1320:=A0=A0 0000000000000000 0000000000400e37 0x00007fffb5ec1330:=A0=A0 0000000000000000 00007fbe7dcff010 0x00007fffb5ec1340:=A0=A0 0630000000000001 0000000000602720 0x00007fffb5ec1350:=A0=A0 063000000000000b 00007fbe84014220 0x00007fffb5ec1360:=A0=A0 00000000006f7840 0000000000000021 0x00007fffb5ec1370:=A0=A0 00007fffb5ec1390 0000000000400cdd 0x00007fffb5ec1380:=A0=A0 00007fbe7dcff010 0000001800401126 0x00007fffb5ec1390:=A0=A0 00007fffb5ec13d0 0000000000400b1b 0x00007fffb5ec13a0:=A0=A0 000000000000003c 00007fffb5ec14b8 0x00007fffb5ec13b0:=A0=A0 0000000100401040 0000000000602280 0x00007fffb5ec13c0:=A0=A0 0000000000000022 00007fbeadec0c00 0x00007fffb5ec13d0:=A0=A0 0000000000000000 00007fbead7561c4 0x00007fffb5ec13e0:=A0=A0 00000000004009c0 00007fffb5ec14b8 0x00007fffb5ec13f0:=A0=A0 0000000100000000 0000000000400a78 0x00007fffb5ec1400:=A0=A0 00007fbeadec0c00 0c1103e05d01fe14 0x00007fffb5ec1410:=A0=A0 0000000000000000 00007fffb5ec14b0 0x00007fffb5ec1420:=A0=A0 0000000000000000 0000000000000000 0x00007fffb5ec1430:=A0=A0 f3ee68387ac1fe14 f36c590a9ffffe14=20 Instructions: (pc=3D0x00007fbead12a32c) 0x00007fbead12a31c:=A0=A0 5d 90 48 83 7b 08 00 0f 85 5d 01 00 00 45 85 ed 0x00007fbead12a32c:=A0=A0 49 8b 36 78 13 45 85 e4 78 0e 47 8d 1c 2c 44 3b= =20 Stack: [0x00007fffb5cc2000,0x00007fffb5ec2000],=A0 sp=3D0x00007fffb5ec1240,= =A0 free space=3D2044k Native frames: (J=3Dcompiled Java code, j=3Dinterpreted, Vv=3DVM code, C=3D= native code) V=A0 [libjvm.so+0x36d32c] ---------------=A0 P R O C E S S=A0 --------------- Java Threads: ( =3D> current thread ) =A0 0x000000000069f800 JavaThread "Low Memory Detector" daemon [_thread_blo= cked, id=3D6925, stack(0x00007fbe8b1b5000,0x00007fbe9b1b6000)] =A0 0x000000000069dc00 JavaThread "CompilerThread1" daemon [_thread_blocked= , id=3D6924, stack(0x0000000041c3e000,0x0000000041d3f000)] =A0 0x0000000000692400 JavaThread "CompilerThread0" daemon [_thread_blocked= , id=3D6923, stack(0x0000000041b3d000,0x0000000041c3e000)] =A0 0x0000000000690c00 JavaThread "Signal Dispatcher" daemon [_thread_block= ed, id=3D6922, stack(0x0000000061e4c000,0x0000000071e4d000)] =A0 0x000000000066cc00 JavaThread "Finalizer" daemon [_thread_blocked, id= =3D6921, stack(0x0000000051e4b000,0x0000000061e4c000)] =A0 0x000000000066b800 JavaThread "Reference Handler" daemon [_thread_block= ed, id=3D6920, stack(0x0000000041e4a000,0x0000000051e4b000)] =3D>0x0000000000609800 JavaThread "main" [_thread_in_vm, id=3D6918, stack(0= x00007fffb5cc2000,0x00007fffb5ec2000)] Other Threads: =A0 0x0000000000666400 VMThread [stack: 0x0000000041a3c000,0x0000000041b3d0= 00] [id=3D6919] =A0 0x00000000006a1800 WatcherThread [stack: 0x0000000041d3f000,0x000000004= 1e40000] [id=3D6926] VM state:not at safepoint (normal execution) VM Mutex/Monitor currently owned by a thread: None Heap =A0def new generation=A0=A0 total 39296K, used 0K [0x00007fbe9b470000, 0x00= 007fbe9df10000, 0x00007fbe9df10000) =A0 eden space 34944K,=A0=A0 0% used [0x00007fbe9b470000, 0x00007fbe9b47000= 0, 0x00007fbe9d690000) =A0 from space 4352K,=A0=A0 0% used [0x00007fbe9d690000, 0x00007fbe9d690000= , 0x00007fbe9dad0000) =A0 to=A0=A0 space 4352K,=A0=A0 0% used [0x00007fbe9dad0000, 0x00007fbe9dad= 0000, 0x00007fbe9df10000) =A0tenured generation=A0=A0 total 87424K, used 405K [0x00007fbe9df10000, 0x= 00007fbea3470000, 0x00007fbea3470000) =A0=A0 the space 87424K,=A0=A0 0% used [0x00007fbe9df10000, 0x00007fbe9df75= 778, 0x00007fbe9df75800, 0x00007fbea3470000) =A0compacting perm gen=A0 total 21248K, used 6148K [0x00007fbea3470000, 0x0= 0007fbea4930000, 0x00007fbea8870000) =A0=A0 the space 21248K,=A0 28% used [0x00007fbea3470000, 0x00007fbea3a7128= 0, 0x00007fbea3a71400, 0x00007fbea4930000) No shared spaces configured. Dynamic libraries: 00400000-00402000 r-xp 00000000 08:01 107801=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoo= p-0.19/libhdfs/hdfs_write_test2 00601000-00602000 rw-p 00001000 08:01 107801=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoo= p-0.19/libhdfs/hdfs_write_test2 00602000-01b8f000 rw-p 00602000 00:00 0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 [heap] 41a3c000-41a3d000 ---p 41a3c000 00:00 0=20 41a3d000-41b3d000 rwxp 41a3d000 00:00 0=20 41b3d000-41b40000 ---p 41b3d000 00:00 0=20 41b40000-41c3e000 rwxp 41b40000 00:00 0=20 41c3e000-41c41000 ---p 41c3e000 00:00 0=20 41c41000-41d3f000 rwxp 41c41000 00:00 0=20 41d3f000-41d40000 ---p 41d3f000 00:00 0=20 41d40000-41e40000 rwxp 41d40000 00:00 0=20 41e4a000-41e4d000 ---p 41e4a000 00:00 0=20 41e4d000-51e4b000 rwxp 41e4d000 00:00 0=20 51e4b000-51e4e000 ---p 51e4b000 00:00 0=20 51e4e000-61e4c000 rwxp 51e4e000 00:00 0=20 61e4c000-61e4f000 ---p 61e4c000 00:00 0=20 61e4f000-71e4d000 rwxp 61e4f000 00:00 0=20 7fbe50dfc000-7fbe50dff000 rwxp 7fbe50dfc000 00:00 0=20 7fbe50dff000-7fbe60dfd000 rwxp 7fbe50dff000 00:00 0=20 7fbe7dcff000-7fbe840cd000 rw-p 7fbe7dcff000 00:00 0=20 7fbe840cd000-7fbe88000000 ---p 7fbe840cd000 00:00 0=20 7fbe8b08d000-7fbe8b093000 r-xp 00000000 08:01 466691=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libmanagement.so 7fbe8b093000-7fbe8b192000 ---p 00006000 08:01 466691=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libmanagement.so 7fbe8b192000-7fbe8b194000 rw-p 00005000 08:01 466691=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libmanagement.so 7fbe8b194000-7fbe8b1b5000 r--s 0022f000 08:01 101826=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoop-0.19/build/ha= doop-0.20.0-dev-core.jar 7fbe8b1b5000-7fbe8b1b8000 ---p 7fbe8b1b5000 00:00 0=20 7fbe8b1b8000-7fbe9b1b6000 rwxp 7fbe8b1b8000 00:00 0=20 7fbe9b1b6000-7fbe9b1f5000 r--p 00000000 08:01 466319=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/locale/hu_HU.utf8/LC_CTYPE 7fbe9b1f5000-7fbe9b227000 rw-p 7fbe9b1f5000 00:00 0=20 7fbe9b227000-7fbe9b3b2000 r--s 02df0000 08:01 434280=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/rt.jar 7fbe9b3b2000-7fbe9b3da000 rw-p 7fbe9b3b2000 00:00 0=20 7fbe9b3da000-7fbe9b3e5000 rwxp 7fbe9b3da000 00:00 0=20 7fbe9b3e5000-7fbe9b405000 rwxp 7fbe9b3e5000 00:00 0=20 7fbe9b405000-7fbe9b450000 rwxp 7fbe9b405000 00:00 0=20 7fbe9b450000-7fbe9b46f000 rwxp 7fbe9b450000 00:00 0=20 7fbe9b46f000-7fbea4930000 rwxp 7fbe9b46f000 00:00 0=20 7fbea4930000-7fbea8870000 rwxp 7fbea4930000 00:00 0=20 7fbea8874000-7fbea8876000 r--s 0000d000 08:01 181160=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/commons-logging-1.1.= 1/commons-logging-1.1.1.jar 7fbea8876000-7fbea887d000 r--s 00000000 08:01 447736=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/gconv/gconv-modules.cache 7fbea887d000-7fbea8aed000 rwxp 7fbea887d000 00:00 0=20 7fbea8aed000-7fbeab87d000 rwxp 7fbea8aed000 00:00 0=20 7fbeab87d000-7fbeab88b000 r-xp 00000000 08:01 466659=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libzip.so 7fbeab88b000-7fbeab98d000 ---p 0000e000 08:01 466659=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libzip.so 7fbeab98d000-7fbeab990000 rw-p 00010000 08:01 466659=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libzip.so 7fbeab990000-7fbeab991000 rw-p 7fbeab990000 00:00 0=20 7fbeab991000-7fbeab9b9000 r-xp 00000000 08:01 466672=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libjava.so 7fbeab9b9000-7fbeabab9000 ---p 00028000 08:01 466672=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libjava.so 7fbeabab9000-7fbeabac0000 rw-p 00028000 08:01 466672=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libjava.so 7fbeabac0000-7fbeabacd000 r-xp 00000000 08:01 466654=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libverify.so 7fbeabacd000-7fbeabbcc000 ---p 0000d000 08:01 466654=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libverify.so 7fbeabbcc000-7fbeabbcf000 rw-p 0000c000 08:01 466654=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/libverify.so 7fbeabbcf000-7fbeabbd9000 r-xp 00000000 08:01 574895=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_files-2.7.so 7fbeabbd9000-7fbeabdd9000 ---p 0000a000 08:01 574895=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_files-2.7.so 7fbeabdd9000-7fbeabddb000 rw-p 0000a000 08:01 574895=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_files-2.7.so 7fbeabddb000-7fbeabde5000 r-xp 00000000 08:01 574897=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_nis-2.7.so 7fbeabde5000-7fbeabfe4000 ---p 0000a000 08:01 574897=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_nis-2.7.so 7fbeabfe4000-7fbeabfe6000 rw-p 00009000 08:01 574897=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libnss_nis-2.7.so 7fbeabfe6000-7fbeabfee000 r-xp 00000000 08:01 574893=A0=A0=A0=A0=A0=A0=A0= 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7fbeac40f000-7fbeac510000 ---p 00007000 08:01 466661=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/native_threads/libhpi.so 7fbeac510000-7fbeac512000 rw-p 00008000 08:01 466661=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/native_threads/libhpi.so 7fbeac512000-7fbeac513000 rw-p 7fbeac512000 00:00 0=20 7fbeac513000-7fbeac51b000 r-xp 00000000 08:01 574902=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/librt-2.7.so 7fbeac51b000-7fbeac71a000 ---p 00008000 08:01 574902=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/librt-2.7.so 7fbeac71a000-7fbeac71c000 rw-p 00007000 08:01 574902=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/librt-2.7.so 7fbeac71c000-7fbeac732000 r-xp 00000000 08:01 574900=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libpthread-2.7.so 7fbeac732000-7fbeac932000 ---p 00016000 08:01 574900=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libpthread-2.7.so 7fbeac932000-7fbeac934000 rw-p 00016000 08:01 574900=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libpthread-2.7.so 7fbeac934000-7fbeac938000 rw-p 7fbeac934000 00:00 0=20 7fbeac938000-7fbeac93a000 r-xp 00000000 08:01 574889=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libdl-2.7.so 7fbeac93a000-7fbeacb3a000 ---p 00002000 08:01 574889=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libdl-2.7.so 7fbeacb3a000-7fbeacb3c000 rw-p 00002000 08:01 574889=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libdl-2.7.so 7fbeacb3c000-7fbeacbbc000 r-xp 00000000 08:01 574890=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libm-2.7.so 7fbeacbbc000-7fbeacdbb000 ---p 00080000 08:01 574890=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libm-2.7.so 7fbeacdbb000-7fbeacdbd000 rw-p 0007f000 08:01 574890=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libm-2.7.so 7fbeacdbd000-7fbead4b2000 r-xp 00000000 08:01 466678=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/server/libjvm.so 7fbead4b2000-7fbead5b1000 ---p 006f5000 08:01 466678=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/server/libjvm.so 7fbead5b1000-7fbead6fb000 rw-p 006f4000 08:01 466678=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /usr/lib/jvm/java-6-sun-1.6.0.06/jr= e/lib/amd64/server/libjvm.so 7fbead6fb000-7fbead738000 rw-p 7fbead6fb000 00:00 0=20 7fbead738000-7fbead890000 r-xp 00000000 08:01 574886=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libc-2.7.so 7fbead890000-7fbeada90000 ---p 00158000 08:01 574886=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libc-2.7.so 7fbeada90000-7fbeada93000 r--p 00158000 08:01 574886=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libc-2.7.so 7fbeada93000-7fbeada95000 rw-p 0015b000 08:01 574886=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/libc-2.7.so 7fbeada95000-7fbeada9a000 rw-p 7fbeada95000 00:00 0=20 7fbeada9a000-7fbeadaa3000 r-xp 00000000 08:01 106434=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoop-0.19/libhdfs/= libhdfs.so. 7fbeadaa3000-7fbeadca2000 ---p 00009000 08:01 106434=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoop-0.19/libhdfs/= libhdfs.so. 7fbeadca2000-7fbeadca3000 rw-p 00008000 08:01 106434=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /home/sony/dev/hadoop-0.19/libhdfs/= libhdfs.so. 7fbeadca3000-7fbeadcc0000 r-xp 00000000 08:01 574883=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/ld-2.7.so 7fbeadcc1000-7fbeadcf6000 rwxp 7fbeadcc1000 00:00 0=20 7fbeadcf6000-7fbeaddac000 rwxp 7fbeadcf6000 00:00 0=20 7fbeaddac000-7fbeadeb1000 rw-p 7fbeaddac000 00:00 0=20 7fbeadeb1000-7fbeadeb2000 r--p 7fbeadeb1000 00:00 0=20 7fbeadeb2000-7fbeadeba000 rw-s 00000000 08:01 163163=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /tmp/hsperfdata_sony/6918 7fbeadeba000-7fbeadebb000 rwxp 7fbeadeba000 00:00 0=20 7fbeadebb000-7fbeadebc000 r--p 7fbeadebb000 00:00 0=20 7fbeadebc000-7fbeadec0000 rw-p 7fbeadebc000 00:00 0=20 7fbeadec0000-7fbeadec2000 rw-p 0001d000 08:01 574883=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 /lib/ld-2.7.so 7fffb5cc2000-7fffb5cc5000 ---p 7fffb5cc2000 00:00 0=20 7fffb5cc5000-7fffb5ec2000 rwxp 7fffffe02000 00:00 0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 [stack] 7fffb5ffe000-7fffb6000000 r-xp 7fffb5ffe000 00:00 0=A0=A0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 [vdso] ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0=A0=A0=A0=A0=A0=A0= =A0=A0=A0=A0=A0=A0=A0=A0=A0=A0=A0 [vsyscall] VM Arguments: jvm_args: -Xss256M -Xoss256M -XX:ThreadStackSize=3D262144 -Xms128M -Xmx128M= =20 java_command: Launcher Type: generic Environment Variables: JAVA_HOME=3D/usr/lib/jvm/java-6-sun CLASSPATH=3D/usr/lib/jvm/java-6-sun-1.6.0.06/jre/lib/rt.jar:/home/sony/dev/= hadoop-0.19/build/hadoop-0.20.0-dev-core.jar:/home/sony/dev/commons-logging= -1.1.1/commons-logging-1.1.1.jar PATH=3D/home/sony/dev/hadoop-0.19/bin:/usr/local/sbin:/usr/local/bin:/usr/s= bin:/usr/bin:/sbin:/bin:/usr/games LD_LIBRARY_PATH=3D/usr/lib/jvm/java-6-sun-1.6.0.06/jre/lib/amd64/server:/ho= me/sony/dev/hadoop-0.19/libhdfs SHELL=3D/bin/bash Signal Handlers: SIGSEGV: [libjvm.so+0x6616e0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x100000= 04 SIGBUS: [libjvm.so+0x6616e0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x1000000= 4 SIGFPE: [libjvm.so+0x5044d0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x1000000= 4 SIGPIPE: [libjvm.so+0x5044d0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x100000= 04 SIGXFSZ: [libjvm.so+0x5044d0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x100000= 04 SIGILL: [libjvm.so+0x5044d0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x1000000= 4 SIGUSR1: SIG_DFL, sa_mask[0]=3D0x00000000, sa_flags=3D0x00000000 SIGUSR2: [libjvm.so+0x506740], sa_mask[0]=3D0x00000000, sa_flags=3D0x100000= 04 SIGHUP: [libjvm.so+0x5064a0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x1000000= 4 SIGINT: [libjvm.so+0x5064a0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x1000000= 4 SIGTERM: [libjvm.so+0x5064a0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x100000= 04 SIGQUIT: [libjvm.so+0x5064a0], sa_mask[0]=3D0x7ffbfeff, sa_flags=3D0x100000= 04 ---------------=A0 S Y S T E M=A0 --------------- OS:lenny/sid uname:Linux 2.6.24-19-generic #1 SMP Wed Aug 20 17:53:40 UTC 2008 x86_64 libc:glibc 2.7 NPTL 2.7=20 rlimit: STACK 1048576k, CORE 0k, NPROC 20480, NOFILE 1024, AS infinity load average:1.23 0.44 0.20 CPU:total 1 (1 cores per cpu, 1 threads per core) family 6 model 15 steppin= g 8, cmov, cx8, fxsr, mmx, sse, sse2, sse3, ssse3 Memory: 4k page, physical 2580404k(957956k free), swap 489940k(489940k free= ) vm_info: Java HotSpot(TM) 64-Bit Server VM (10.0-b22) for linux-amd64 JRE (= 1.6.0_06-b02), built on Mar 25 2008 01:03:02 by "java_re" with gcc 3.2.2 (S= uSE Linux) time: Thu Nov=A0 6 11:19:55 2008 elapsed time: 29 seconds =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D My test program uses the JniHelper.h and .c files from hadoop-0.19/src/c++/= libhdfs. The test program creates buffers to be written out by hdfsWrite. I thought = that the main thread's stack is not enough to handle this big buffers so I = set the following parameters for the forked JVM: jvm_args: -Xss256M -Xoss256M -XX:ThreadStackSize=3D262144 -Xms128M -Xmx128M= =20 >From the log it can be seen that the main thread's stack still remains 2MB,= though it should be 256MB. I played a bit with the file sizes and as it turned out it works for 1MB, 1= 0 MB, 50 MB, 75MB, doesn't work for 99MB, 100MB, and above. Environmental information. I use hadoop-0.19 from the SVN repository. Ubuntu Gutsy Linux: Linux 2.6.24-19-generic #1 SMP Wed Aug 20 17:53:40 UTC = 2008 x86_64 GNU/Linux I run linux under VMware. I use Java 6. I saw previously on the list libhdfs problems with SIGSEGV but I couldn't f= ind the answer to solve my problem.. Thank you in advance for helping me. Cheers, Tamas =0A=0A=0A --0-1860757720-1225992643=:82438--