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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Segfault in `node::Environment::KickNextTick`","articleBody":"We're encountering a segfault during load testing of an http-based application, also using express and sockjs. In particular, the load test establishes a whole bunch of long-lived web socket connections, and the application crashes while we ramp up connections.\n\nThis is with official 64-bit Linux binaries on Ubuntu 15.04 (EC2 ami-df95b5a8). The backtraces and the fact that the crashes don't seem to occur on io.js 3.2.0 make me suspect #2355 is related.\n\nBacktrace from io.js 3.3.0:\n\n\u003cpre\u003e\nProgram received signal SIGSEGV, Segmentation fault.\n0x00000000008f0a03 in v8::Isolate::SuppressMicrotaskExecutionScope::SuppressMicrotaskExecutionScope(v8::Isolate*) ()\n(gdb) bt\n#0  0x00000000008f0a03 in v8::Isolate::SuppressMicrotaskExecutionScope::SuppressMicrotaskExecutionScope(v8::Isolate*) ()\n#1  0x0000000000b84113 in v8::internal::Isolate::RunMicrotasks() ()\n#2  0x0000000000da5ad8 in node::Environment::KickNextTick() ()\n#3  0x0000000000dd860f in node::Parser::OnReadImpl(long, uv_buf_t const*, uv_handle_type, void*) ()\n#4  0x0000000000deda53 in node::StreamWrap::OnRead(uv_stream_s*, long, uv_buf_t const*) ()\n#5  0x0000000000f66d8f in uv__read (stream=stream@entry=0x3b2c510) at ../deps/uv/src/unix/stream.c:1178\n#6  0x0000000000f67400 in uv__stream_io (loop=\u003coptimized out\u003e, w=0x3b2c598, events=1) at ../deps/uv/src/unix/stream.c:1241\n#7  0x0000000000f6cc45 in uv__io_poll (loop=loop@entry=0x180d000 \u003cdefault_loop_struct\u003e, timeout=0) at ../deps/uv/src/unix/linux-core.c:345\n#8  0x0000000000f5dfd6 in uv_run (loop=0x180d000 \u003cdefault_loop_struct\u003e, mode=UV_RUN_ONCE) at ../deps/uv/src/unix/core.c:341\n#9  0x0000000000dbdaa8 in node::Start(int, char**) ()\n#10 0x00007fc5d03c8a40 in __libc_start_main (main=0x71e340 \u003cmain\u003e, argc=5, argv=0x7fff26b15868, init=\u003coptimized out\u003e, fini=\u003coptimized out\u003e,\n    rtld_fini=\u003coptimized out\u003e, stack_end=0x7fff26b15858) at libc-start.c:289\n#11 0x000000000071e53d in _start ()\nWarning: the current language does not match this frame.\n\u003c/pre\u003e\n\n\nBacktrace on node.js 4.1.0:\n\n\u003cpre\u003e\nProgram received signal SIGSEGV, Segmentation fault.\n0x0000000000dd722e in node::Environment::KickNextTick() ()\n(gdb) bt\n#0  0x0000000000dd722e in node::Environment::KickNextTick() ()\n#1  0x0000000000e09c0f in node::Parser::OnReadImpl(long, uv_buf_t const*, uv_handle_type, void*) ()\n#2  0x0000000000e1f0f3 in node::StreamWrap::OnRead(uv_stream_s*, long, uv_buf_t const*) ()\n#3  0x0000000000f9930f in uv__read (stream=stream@entry=0x2855d70) at ../deps/uv/src/unix/stream.c:1178\n#4  0x0000000000f99980 in uv__stream_io (loop=\u003coptimized out\u003e, w=0x2855df8, events=1) at ../deps/uv/src/unix/stream.c:1241\n#5  0x0000000000f9f1c5 in uv__io_poll (loop=loop@entry=0x1859ec0 \u003cdefault_loop_struct\u003e, timeout=0) at ../deps/uv/src/unix/linux-core.c:345\n#6  0x0000000000f90566 in uv_run (loop=0x1859ec0 \u003cdefault_loop_struct\u003e, mode=UV_RUN_ONCE) at ../deps/uv/src/unix/core.c:341\n#7  0x0000000000def3f0 in node::Start(int, char**) ()\n#8  0x00007febbf92aa40 in __libc_start_main (main=0x719210 \u003cmain\u003e, argc=5, argv=0x7ffcef1aca88, init=\u003coptimized out\u003e, fini=\u003coptimized out\u003e,\n    rtld_fini=\u003coptimized out\u003e, stack_end=0x7ffcef1aca78) at libc-start.c:289\n#9  0x000000000071940d in _start ()\nWarning: the current language does not match this frame.\n\u003c/pre\u003e\n","author":{"url":"https://github.com/stephank","@type":"Person","name":"stephank"},"datePublished":"2015-09-17T14:05:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/2928/node/issues/2928"}