When I am trying to open a source (url) without the internet on the device (flight mode on), I receive the next logs:
[ +1 ms] flutter: SocketException: Failed host lookup: 'raw.githubusercontent.com' (OS Error: nodename nor servname provided, or not known, errno = 8)
[ +1 ms] flutter:
#0 _NativeSocket.startConnect (dart:io-patch/socket_patch.dart:682:35)
#1 _RawSocket.startConnect (dart:io-patch/socket_patch.dart:1817:26)
#2 RawSocket.startConnect (dart:io-patch/socket_patch.dart:27:23)
#3 RawSecureSocket.startConnect (dart:io/secure_socket.dart:237:22)
#4 SecureSocket.startConnect (dart:io/secure_socket.dart:60:28)
#5 _ConnectionTarget.connect (dart:_http/http_impl.dart:2438:24)
#6 _HttpClient._getConnection.connect (dart:_http/http_impl.dart:2834:12)
#7 _HttpClient._getConnection (dart:_http/http_impl.dart:2839:12)
#8 _HttpClient._openUrl (dart:_http/http_impl.dart:2698:12)
#9 _HttpClient.getUrl (dart:_http/http_impl.dart:2575:48)
#10 _proxyHandlerForUri.handler (package:just_audio/just_audio.dart:3039:46)
#11 _proxyHandlerForUri.handler (package:just_audio/just_audio.dart:3038:23)
#12 _ProxyHttpServer.start.<anonymous closure> (package:just_audio/just_audio.dart:1946:16)
#13 _ProxyHttpServer.start<…>
try/catch doesn't help...
Any advice or idea?
UPDATE:
It take me some time to debug example app and compare with mine.
The issue comes cos I use headers with my source.
Here is piece of code from library, where dramattic change happened:
#override
Future<void> _setup(AudioPlayer player) async {
await super._setup(player);
if (uri.scheme == 'asset') {
_overrideUri = await _loadAsset(uri.pathSegments.join('/'));
} else if (uri.scheme != 'file' &&
!kIsWeb &&
(headers != null || player._userAgent != null)) {
await player._proxy.ensureRunning();
_overrideUri = player._proxy.addUriAudioSource(this);
}
}
we are interested in this particular line:
(headers != null || player._userAgent != null)) {
I use headers, so in my app code goes futher, and then fails inside _proxyHandlerForUri, line 3039.
Related
I am getting a signal 6 error when i am trying to fetch data from couchbase, this occurs at erratic intervals. I am using version 1.1 and from the code i can see if poll returns value less than 0, errno_assert is being triggered which crashes the application with signal 6.
Below is the backtrace of nanomsg thread:
Program terminated with signal 6, Aborted.
#0 0x00007ffff4c74a33 in select () from /usr/lib64/libc.so.6
Missing separate debuginfos, use: debuginfo-install boost-system-1.53.0-28.el7.x86_64 cyrus-sasl-lib-2.1.26-23.el7.x86_64 keyutils-libs-1.5.8-3.el7.x86_64 krb5-libs-1.15.1-50.el7.x86_64 libcom_err-1.42.9-19.el7.x86_64 libcurl-7.29.0-59.el7_9.1.x86_64 libidn-1.28-4.el7.x86_64 libselinux-2.5-15.el7.x86_64 libssh2-1.8.0-4.el7.x86_64 nspr-4.32.0-1.el7_9.x86_64 nss-3.53.1-3.el7_9.x86_64 nss-util-3.67.0-1.el7_9.x86_64 openldap-2.4.44-22.el7.x86_64 openssl-libs-1.0.2k-21.el7_9.x86_64 pcre-8.32-17.el7.x86_64 zlib-1.2.7-19.el7_9.x86_64
(gdb) thread 18
[Switching to thread 18 (Thread 0x7fffcef74700 (LWP 40630))]
#0 0x00007ffff4bfce00 in _IO_cleanup () from /usr/lib64/libc.so.6
(gdb) bt full
#0 0x00007ffff4bfce00 in _IO_cleanup () from /usr/lib64/libc.so.6
No symbol table info available.
#1 0x00007ffff4bb6be5 in abort () from /usr/lib64/libc.so.6
No symbol table info available.
#2 0x00000000009ff371 in nn_err_abort ()
No symbol table info available.
#3 0x00000000009ff2cd in nn_efd_wait ()
No symbol table info available.
#4 0x00000000009fbb13 in nn_sock_recv ()
No symbol table info available.
#5 0x00000000009f95fa in nn_recvmsg ()
No symbol table info available.
#6 0x00000000009f9015 in nn_recv ()
No symbol table info available.
#7 0x000000000099b8c9 in vcmNpsIcmMsgRecv ()
No symbol table info available.
#8 0x0000000000975a57 in __vcmNpsIcmRecv ()
No symbol table info available.
#9 0x00000000007261f5 in vcmDpeEmaIcmStatsCb(void*) ()
No symbol table info available.
#10 0x000000000099a54b in vcmNpsIcmInterfaceCreate ()
No symbol table info available.
#11 0x000000000095b1c0 in ?? ()
No symbol table info available.
#12 0x00007ffff7250ea5 in start_thread (arg=0x7fffcef74700) at pthread_create.c:307
__res =
pd = 0x7fffcef74700
now =
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140736665700096, -1738215837302118578, 0, 33558528, 0, 140736665700096, 1738108024908031822,
1738235171653297998}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
#13 0x00007ffff4c7d9fd in clone () from /usr/lib64/libc.so.6
This is present in one of our stdout files:
Invalid argument [22] (home/3rd-party/nanomsg/src/utils/efd.c:91)
Code::
88 rc = poll (&pfd, 1, timeout);
89 if (nn_slow (rc < 0 && errno == EINTR))
90 return -EINTR;
91 errno_assert (rc >= 0);
I found that in version 1.2, this errno_assert is not present in the code, Can this errno_assert be safely removed from our code without updating the nanomsg version . Please help.
Realm 5.0.2
I'm trying to understand how this crash is possible. It is crashing when calling first on a Realm Results object. I'm guessing this is a concurrency issue, but Realm is instantiated on same thread as query, and the Realm objects are immediately converted to app objects. But if it's not a concurrency issue, then ... what?!
0
Thread 1 Queue : com.apple.main-thread (serial)
#0 0x00000001037d8f7c in realm::IndexArray::index_string_all(realm::StringData, std::__1::vector<realm::ObjKey, std::__1::allocator<realm::ObjKey> >&, realm::ClusterColumn const&) const ()
#1 0x00000001036c8fdc in realm::IntegerNode<realm::ArrayIntNull, realm::Equal>::init() ()
#2 0x00000001036a740c in realm::Query::init() const ()
#3 0x00000001036a74dc in realm::Query::find_all(realm::ConstTableView&, unsigned long, unsigned long, unsigned long) const ()
#4 0x0000000103866e7c in realm::ConstTableView::do_sync() ()
#5 0x00000001036a78d0 in realm::Query::find_all(unsigned long, unsigned long, unsigned long) ()
#6 0x00000001036a7d50 in realm::Query::find_all(realm::DescriptorOrdering const&) ()
#7 0x00000001033af2c4 in realm::Results::do_evaluate_query_if_needed(bool)
#8 0x00000001033aeca8 in realm::util::Optional<realm::Obj> realm::Results::try_get<realm::Obj>(unsigned long)
#9 0x00000001033af01c in realm::util::Optional<realm::Obj> realm::Results::first<realm::Obj>()
#10 0x0000000103542b9c in _ZZN5realm7Results5firstI18RLMAccessorContextEEDaRT_ENKUlTyS4_E_clIPNS_3ObjEEES3_S4_
#11 0x0000000103541d38 in _ZN5realmL14switch_on_typeINS_3ObjEZNS_7Results5firstI18RLMAccessorContextEEDaRT_EUlTyS6_E_EES5_NS_12PropertyTypeEOT0_
#12 0x00000001035418c0 in _ZNK5realm7Results8dispatchIZNS0_5firstI18RLMAccessorContextEEDaRT_EUlTyS5_E_EES4_OS5_
#13 0x0000000103541870 in auto realm::Results::first<RLMAccessorContext>(RLMAccessorContext&)
#14 0x0000000103541834 in -[RLMResults firstObject]::$_8::operator()() const
#15 0x000000010353d5c4 in auto translateRLMResultsErrors<-[RLMResults firstObject]::$_8>(-[RLMResults firstObject]::$_8&&, NSString*)
#16 0x000000010353d544 in -[RLMResults firstObject]
#17 0x0000000104968cf4 in Results.first.getter
#18 0x000000010228e97c in static LibraryManager.LibraryPersistence.findPersistentTag(permanentId:temporaryId:)
#19 0x000000010228e500 in LibraryManager.getTag(forAssignment:)
#20 0x000000010220c284 in closure #1 in AudiobookUserSettings.tags.getter
#21 0x000000019eb5e038 in Sequence.compactMap<A>(_:) ()
#22 0x000000010220c1d0 in AudiobookUserSettings.tags.getter
#23 0x0000000102195e70 in Audiobook.tags.getter
#24 0x000000010226407c in FolderManager.updateFromLibrary()
#25 0x00000001022ca78c in LibraryTableViewController.refreshFolders()
#26 0x00000001022c6930 in closure #1 in LibraryTableViewController.refreshView()
#27 0x0000000102150700 in thunk for #escaping #callee_guaranteed () -> () ()
#28 0x0000000104b7605c in _dispatch_call_block_and_release ()
#29 0x0000000104b774d8 in _dispatch_client_callout ()
#30 0x0000000104b85f64 in _dispatch_main_queue_callback_4CF ()
#31 0x00000001911cc8d4 in __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__ ()
#32 0x00000001911c758c in __CFRunLoopRun ()
#33 0x00000001911c6bc8 in CFRunLoopRunSpecific ()
#34 0x000000019b5a85cc in GSEventRunModal ()
#35 0x0000000195379744 in UIApplicationMain ()
#36 0x00000001023d838c in main
#37 0x0000000191043384 in start ()
Enqueued from audiobookSettings-persistence (Thread 33) Queue
#0 0x0000000104b7bdd0 in dispatch_async ()
#1 0x00000001c807004c in OS_dispatch_queue.async(group:qos:flags:execute:) ()
#2 0x00000001022c6808 in LibraryTableViewController.refreshView()
#3 0x00000001022c6288 in closure #1 in LibraryTableViewController.viewWillAppear(_:)
The relevant code from the app:
func getTag(forAssignment assignment: TagAssignment) -> Tag? {
let tag = LibraryPersistence.findPersistentTag(permanentId: assignment.permanentTagId,
temporaryId: assignment.temporaryTagId)
return tag?.toTag()
}
static func findPersistentTag(permanentId: Int? = nil, temporaryId: String? = nil) -> PersistentTag? {
guard let userId = getIdForCurrentUser() else {
return nil
}
let realm = try! Realm()
// First try lookup by permanent tag id
if let permanentId = permanentId {
let permanentIdNumber = NSNumber(value: permanentId)
if let stored = realm.objects(PersistentTag.self).filter("permanentId == %# AND userId == %#", permanentIdNumber, userId).first {
return stored
}
}
// Then try temporary tag id
if let temporaryId = temporaryId {
return realm.objects(PersistentTag.self).filter("temporaryId == %# AND userId == %#", temporaryId, userId).first
}
return nil
}
UPDATE: More crash details:
* thread #1, queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=EXC_I386_GPFLT)
#0: 0x0000000103bfc2fd Realm`realm::util::EncryptedFileMapping::read_barrier(void const*, unsigned long, unsigned long (*)(char const*)) + 29
* frame #1: 0x00000001035ce000 Realm`realm::util::do_encryption_read_barrier(addr=0x00007fff87a95540, size=8, header_to_size=(Realm`realm::NodeHeader::get_byte_size_from_header(char const*) at node_header.hpp:201), mapping=0xca4c51df08c18be5)(char const*), realm::util::EncryptedFileMapping*) at file_mapper.hpp:133:14
#2: 0x0000000103b496ee Realm`realm::IndexArray::index_string_all(realm::StringData, std::__1::vector<realm::ObjKey, std::__1::allocator<realm::ObjKey> >&, realm::ClusterColumn const&) const + 398
...
It looks like you're not the only one with this problem.
https://github.com/realm/realm-cocoa/issues/6556
This looks like a problem with 5.0.x, some have downgraded to 4.x to remove the problem. It references another issue (bottom of the report) which has been fixed and merged, but not yet released.
I'd read the bug report and see if this follows your experience, then either (a) follow the workaround, or (b) downgrade to 4.4.x. Watch the fix issue (https://github.com/realm/realm-core/pull/3828) for being included in a new release.
I have created a shared library which has a function displaywebview that launches a GTK window and loads the URL into it using webkit2gtk.
Now I am writing a caller program which loads this library using dlopen, gets the method displaywebview using dlsym and calls this function.
I get a seg fault inside displaywebview at the point where I call webkit_web_view_new(). Could someone help me out on why this is happening?
webkit_main.so
#include <gtk/gtk.h>
#include <webkit2/webkit2.h>
extern "C"
{
int displayWebView();
}
int displayWebView()
{
printf("Entered in displayWebView\n");
// Initialize GTK+
gtk_init(NULL, NULL);
// Create an 800x600 window that will contain the browser instance
GtkWidget *main_window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(main_window), 800, 600);
WebKitWebView *webView = (WebKitWebView*)webkit_web_view_new();
// webkit_web_view_new();
// // Put the browser area into the main window
gtk_container_add(GTK_CONTAINER(main_window), GTK_WIDGET(webView));
// Set up callbacks so that if either the main window or the browser instance is
// closed, the program will exit
g_signal_connect(main_window, "destroy", G_CALLBACK(destroyWindowCb), NULL);
g_signal_connect(webView, "close", G_CALLBACK(closeWebViewCb), main_window);
// // Load a web page into the browser instance
webkit_web_view_load_uri(webView, "http://www.gmail.com");
// // Make sure that when the browser area becomes visible, it will get mouse
// // and keyboard events
gtk_widget_grab_focus(GTK_WIDGET(webView));
// // Make sure the main window and all its contents are visible
gtk_widget_show_all(main_window);
// // Run the main GTK+ event loop
gtk_main();
return 0;
}
caller.cpp
#include <unistd.h>
#include <stdlib.h>
#include <dlfcn.h>
#include <stdio.h>
typedef int (*PDISPLAYWEBVIEW)();
int main(){
void* hnd = dlopen("/home/radix/Desktop/webkit_socket/webkit_main.so", RTLD_LAZY);
// sleep(10);
if(hnd!=NULL){
PDISPLAYWEBVIEW pdisplayWebView = (PDISPLAYWEBVIEW)dlsym(hnd,"displayWebView");
if(pdisplayWebView == NULL){
printf("dlsym error %s", dlerror());
}
else{
printf("Everything okay, launch the function\n");
(*pdisplayWebView)();
}
dlclose(hnd);
}
else{
printf("The error is %s", dlerror());
}
}
BACKTRACE details:
Thread 1 "caller" received signal SIGSEGV, Segmentation fault.
0x0000000000000000 in ?? ()
(gdb) bt
#0 0x0000000000000000 in ?? ()
#1 0x00007ffff790d165 in std::thread::_M_start_thread(std::unique_ptr<std::thread::_State, std::default_delete<std::thread::_State> >, void (*)()) () from /usr/lib/x86_64-linux-gnu/libstdc++.so.6
#2 0x00007ffff2009168 in bmalloc::Scavenger::Scavenger(std::lock_guard<bmalloc::Mutex>&) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#3 0x00007ffff1d12f61 in bmalloc::PerProcess<bmalloc::Scavenger>::getSlowCase() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#4 0x00007ffff2001fcc in bmalloc::Heap::Heap(bmalloc::HeapKind, std::lock_guard<bmalloc::Mutex>&) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#5 0x00007ffff1fff1ff in bmalloc::PerProcess<bmalloc::PerHeapKind<bmalloc::Heap> >::getSlowCase() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#6 0x00007ffff1ffee99 in bmalloc::Cache::Cache(bmalloc::HeapKind) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#7 0x00007ffff1fff311 in bmalloc::PerThread<bmalloc::PerHeapKind<bmalloc::Cache> >::getSlowCase() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#8 0x00007ffff1ffef0d in bmalloc::Cache::allocateSlowCaseNullCache(bmalloc::HeapKind, unsigned long) () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#9 0x00007ffff1af22a2 in JSC::ExecutableAllocator::initializeAllocator() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#10 0x00007ffff1d0bf25 in ?? () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#11 0x00007ffff0926739 in __pthread_once_slow (once_control=0x7ffff22a6ff0, init_routine=0x7ffff790c120 <__once_proxy>) at pthread_once.c:116
#12 0x00007ffff1d0d90d in JSC::initializeThreading() () from /usr/lib/x86_64-linux-gnu/libjavascriptcoregtk-4.0.so.18
#13 0x00007ffff49beb29 in ?? () from /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#14 0x00007ffff4aa4add in ?? () from /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#15 0x00007ffff4b0eb00 in ?? () from /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#16 0x00007ffff0e5e777 in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#17 0x00007ffff0e5fc0d in g_object_newv () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#18 0x00007ffff0e603c4 in g_object_new () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#19 0x00007ffff4b0ab7d in ?? () from /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#20 0x00007ffff0ba74a5 in g_once_impl () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#21 0x00007ffff4b31cc9 in webkit_web_view_new () from /usr/lib/x86_64-linux-gnu/libwebkit2gtk-4.0.so.37
#22 0x00007ffff6d96f0f in displayWebView () at webkit_main.cpp:81
#23 0x00005555555548df in main () at caller.cpp:20
Note:
When I use the same program with webkitgtk-1.0 it runs absolutely fine. With webkit2gtk-4.0 it gives this issue.
When I compile caller.cpp with libwebkit2gtk-4.0 it strangely doesn't give seg fault anymore.
Could someone help me out why this is happening?
I am using debian 9 with webkit2gtk-4.0-37 of version: 2.22.2-1~bpo9+1
There are some compiler options that have to be the same within every components (object modules, libraries, shared objects) so that they could work together.
Other than -pthread, large-file-support (in 32-bit) comes to my mind.
Another possible source of problems if different versions of a component are linked together.
Does jaguar_orm support reflexive relationships?
I have a Category class that can be part of another Category:
class Category {
/// constructor
Category();
Category.make(this.id, this.name);
/// fields
#PrimaryKey()
int id;
#Column(isNullable: false)
String name;
#BelongsTo(CategoryBean, isNullable: true, refCol: 'id')
int parentCategoryId;
/// database
// String toString() => "Product($id, $name, $parentCategoryId)";
String toString() => "Product($id, $name)";
}
When I try to create one I get a stack overflow as follows:
Exception while parsing field: id!
Stack Overflow
#0 _Uri._uriEncode (dart:core/runtime/liburi_patch.dart:34:3)
#1 _Uri._makePath.<anonymous closure> (dart:core/uri.dart:2116:23)
#2 ListIterable.join (dart:_internal/iterable.dart)
#3 _Uri._makePath (dart:core/uri.dart:2117:12)
#4 _SimpleUri.replace (dart:core/uri.dart:4358:19)
#5 urlOfElement (package:source_gen/src/utils.dart:87:11)
#6 _MirrorTypeChecker.isExactly (package:source_gen/src/type_checker.dart:264:49)
#7 _ListBase&Object&ListMixin.any (dart:collection/list.dart)
#8 TypeChecker.isAssignableFromType (package:source_gen/src/type_checker.dart:162:57)
#9 ParsedBean._makeField.<anonymous closure> (package:jaguar_orm_gen/src/parser/parser.dart:351:47)
#10 WhereIterator.moveNext (dart:_internal/iterable.dart)
#11 MappedIterator.moveNext (dart:_internal/iterable.dart:391:19)
#12 new List.from (dart:core/runtime/libarray_patch.dart:40:17)
#13 ParsedBean._makeField (package:jaguar_orm_gen/src/parser/parser.dart:472:34)
#14 ParsedBean._parseFields (package:jaguar_orm_gen/src/parser/parser.dart:325:21)
#15 ParsedBean.detect (package:jaguar_orm_gen/src/parser/parser.dart:74:5)
#16 ParsedBean.detect (package:jaguar_orm_gen/src/parser/parser.dart:85:56)
This repeats for some time.
Is there something special I need to do, to prevent the stack overflow?
You need to add a #HasOne or #HasMany decorator depending of your case.
This is TensorFlow 1.0.1 installed via pip.
It runs via an embedded CPython (libpython).
Sometimes (maybe 30% of my runs) it hangs in Py_Finalize(), and I see this backtrace:
/work/asr2/zeyer/sprint-executables/20160902.235443.fad8965.linux-x86_64-standard/Flf/flf-tool.linux-intel-standard(_ZN17AssertionsPrivate15safe_stackTraceEi+0x21)[0xc5b891]
/work/asr2/zeyer/sprint-executables/20160902.235443.fad8965.linux-x86_64-standard/Flf/flf-tool.linux-intel-standard[0xc5b8ef]
/u/zeyer/tools/glibc217/libpthread.so.0(+0x113d0)[0x2b6d89bad3d0]
/u/zeyer/tools/glibc217/libpthread.so.0(raise+0x29)[0x2b6d89bad2a9]
/u/zeyer/py-envs/py2-ubuntu16/local/lib/python2.7/site-packages/faulthandler.so(+0x3198)[0x2b6dc2372198]
/u/zeyer/tools/glibc217/libpthread.so.0(+0x113d0)[0x2b6d89bad3d0]
/u/zeyer/py-envs/py2-ubuntu16/local/lib/python2.7/site-packages/google/protobuf/pyext/_message.so(+0xaa943)[0x2b6dc14f0943]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(+0x160f6b)[0x2b6d8b23af6b]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(+0xc8f0e)[0x2b6d8b1a2f0e]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(+0x15d747)[0x2b6d8b237747]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyDict_SetItem+0x7b)[0x2b6d8b23becb]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(_PyModule_Clear+0xb5)[0x2b6d8b278565]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(PyImport_Cleanup+0x437)[0x2b6d8b2280e7]
/usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0(Py_Finalize+0xfe)[0x2b6d8b1fed9e]
/work/asr2/zeyer/sprint-executables/20160902.235443.fad8965.linux-x86_64-standard/Flf/flf-tool.linux-intel-standard(_ZN6Python11Initializer19AtExitUninitHandlerEv+0x2e)[0xff80de]
/u/zeyer/tools/glibc217/libc.so.6(+0x39fe8)[0x2b6d8bc39fe8]
/u/zeyer/tools/glibc217/libc.so.6(+0x3a035)[0x2b6d8bc3a035]
/u/zeyer/tools/glibc217/libc.so.6(__libc_start_main+0xf7)[0x2b6d8bc20837]
/work/asr2/zeyer/sprint-executables/20160902.235443.fad8965.linux-x86_64-standard/Flf/flf-tool.linux-intel-standard[0x7d6991]
or with GDB:
(gdb) bt full
#0 0x00002b6dc14f0943 in std::tr1::_Hashtable<google::protobuf::DescriptorPool const*, std::pair<google::protobuf::DescriptorPool const* const, google::protobuf::python::PyDescriptorPool*>, std::allocator<std::pair<google::protobuf::DescriptorPool const* const, google::protobuf::python::PyDescriptorPool*> >, std::_Select1st<std::pair<google::protobuf::DescriptorPool const* const, google::protobuf::python::PyDescriptorPool*> >, std::equal_to<google::protobuf::DescriptorPool const*>, google::protobuf::hash<google::protobuf::DescriptorPool const*>, std::tr1::__detail::_Mod_range_hashing, std::tr1::__detail::_Default_ranged_hash, std::tr1::__detail::_Prime_rehash_policy, false, false, true>::erase (
__k=#0x7ffd1bbea740: 0x8269780, this=0x2b6dc1826e40 <google::protobuf::python::descriptor_pool_map>)
at /opt/rh/devtoolset-2/root/usr/include/c++/4.8.2/tr1/hashtable.h:1041
__slot = <optimized out>
__saved_slot = <optimized out>
__code = 136746880
__n = 0
__result = 0
#1 google::protobuf::python::cdescriptor_pool::Dealloc (self=0x2b6dc0d86880)
at google/protobuf/pyext/descriptor_pool.cc:152
No locals.
#2 0x00002b6d8b23af6b in ?? () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#3 0x00002b6d8b1a2f0e in ?? () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#4 0x00002b6d8b237747 in ?? () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#5 0x00002b6d8b23becb in PyDict_SetItem () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#6 0x00002b6d8b278565 in _PyModule_Clear () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#7 0x00002b6d8b2280e7 in PyImport_Cleanup () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#8 0x00002b6d8b1fed9e in Py_Finalize () from /usr/lib/x86_64-linux-gnu/libpython2.7.so.1.0
No symbol table info available.
#9 0x0000000000ff80de in Python::Initializer::AtExitUninitHandler() ()
No symbol table info available.
#10 0x00002b6d8bc39fe8 in ?? () from /u/zeyer/tools/glibc217/libc.so.6
No symbol table info available.
#11 0x00002b6d8bc3a035 in exit () from /u/zeyer/tools/glibc217/libc.so.6
No symbol table info available.
#12 0x00002b6d8bc20837 in __libc_start_main () from /u/zeyer/tools/glibc217/libc.so.6
No symbol table info available.
#13 0x00000000007d6991 in _start ()
No symbol table info available.
I.e. it happens in _PyModule_Clear, and then inside google/protobuf/pyext/_message.so, that's why I think this is TF related.
In the case when it does not hang, I see this output:
Exception AttributeError: AttributeError("'NoneType' object has no attribute 'raise_exception_on_not_ok_status'",) in <bound method Session.__del__ of <tensorflow.python.client.session.Session object at 0x2afd625b12d0>> ignored
I also asked upstream on TF but they suggested to post it here.
Any idea why it might hang and how to resolve this?
Note that this crash was happening inside a callback via std::atexit. I guess the problem is that some stuff from Google or std is cleaned up before I call Py_Finalize from my atexit-handler which leads to this crash. I think this should not happen though.
Anyway, I kind of worked around the problem by not using std::atexit now but by using my own exit handler logic instead (which however would not work if I directly use exit() anywhere).