I am attempting to use Paste to serve a small web app that uses neo4j via the Python bindings. I get a segfault whenever I try to create a new database via 'neo4j.GraphDatabase'. I have narrowed this down to the following minimal sample:
http://pastebin.com/MkNRvLR6 The top of the stack trace looks like this: Stack: [0xb42e7000,0xb4ae8000], sp=0xb4ae44f0, free space=8181k Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code) C [_jpype.so+0x26497] JPJavaEnv::NewObjectA(_jclass*, _jmethodID*, jvalue*)+0x37 C [_jpype.so+0x3c0e8] JPMethodOverload::invokeConstructor(_jclass*, std::vector<HostRef*, std::allocator<HostRef*> >&)+0x178 C [_jpype.so+0x3a417] JPMethod::invokeConstructor(std::vector<HostRef*, std::allocator<HostRef*> >&)+0x47 C [_jpype.so+0x1beba] JPClass::newInstance(std::vector<HostRef*, std::allocator<HostRef*> >&)+0x2a C [_jpype.so+0x67b9c] PyJPClass::newClassInstance(_object*, _object*)+0xfc C [python+0x96822] PyEval_EvalFrameEx+0x4332 C [python+0x991e7] PyEval_EvalCodeEx+0x127 I believe that is JPype trying to create an EmbeddedGraphDatabase via neo4j.GraphDatabase() in python. I noticed this previous thread: http://neo4j-community-discussions.438527.n3.nabble.com/Neo4j-CPython-Pylons-and-threading-td942435.html That looks like it might be related, except this problem occurs whenever I try to create a database, not on shutdown. The issue definitely has something to do with using neo4j under Paste; here's a Python shell session which shows neo4j working: >>> import webob >>> import app >>> debug_app = app.DebugApp() >>> response = debug_app(webob.Request.blank('/')) >>> response.body 'it worked' Relevant version info: - ubuntu 11.04 (same crash under 32- and 64-bit systems) - Python 2.7.1-0ubuntu5 - neo4j_embedded-1.5.b2 - jpype 0.5.4.1-3 - paste 1.7.5.1 - OpenJDK 6b22-1.10.2 (same crash under the Sun JRE) Thanks for your time and any clues you might have. _______________________________________________ Neo4j mailing list [email protected] https://lists.neo4j.org/mailman/listinfo/user
