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ASF GitHub Bot commented on ARROW-2195: --------------------------------------- pcmoritz commented on a change in pull request #1807: ARROW-2195: [Plasma] Return auto-releasing buffers URL: https://github.com/apache/arrow/pull/1807#discussion_r178610323 ########## File path: cpp/src/plasma/client.cc ########## @@ -72,6 +72,27 @@ constexpr int64_t kThreadPoolSize = 8; constexpr int64_t kBytesInMB = 1 << 20; static std::vector<std::thread> threadpool_(kThreadPoolSize); +/// A Buffer class that automatically releases the backing plasma object +/// when it goes out of scope. +class PlasmaBuffer : public Buffer { + public: + ~PlasmaBuffer(); + + PlasmaBuffer(PlasmaClient* client, const ObjectID& object_id, + const std::shared_ptr<Buffer>& buffer) + : Buffer(buffer, 0, buffer->size()), client_(client), object_id_(object_id) { + if (buffer->is_mutable()) { + is_mutable_ = true; + } + } + + private: + PlasmaClient* client_; + ObjectID object_id_; +}; + +PlasmaBuffer::~PlasmaBuffer() { (void)client_->Release(object_id_); } Review comment: we have ARROW_UNUSED for this: https://github.com/apache/arrow/blob/ecb7605a640dc34452dd696240a74df9a9f7f39b/cpp/src/arrow/util/macros.h#L28 ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org > [Plasma] Segfault when retrieving RecordBatch from plasma store > --------------------------------------------------------------- > > Key: ARROW-2195 > URL: https://issues.apache.org/jira/browse/ARROW-2195 > Project: Apache Arrow > Issue Type: Bug > Components: Plasma (C++), Python > Affects Versions: 0.8.0 > Reporter: Philipp Moritz > Priority: Major > Labels: pull-request-available > Fix For: 0.10.0 > > > It can be reproduced with the following script: > {code:python} > import pyarrow as pa > import pyarrow.plasma as plasma > def retrieve1(): > client = plasma.connect('test', "", 0) > key = "keynumber1keynumber1" > pid = plasma.ObjectID(bytearray(key,'UTF-8')) > [buff] = client .get_buffers([pid]) > batch = pa.RecordBatchStreamReader(buff).read_next_batch() > print(batch) > print(batch.schema) > print(batch[0]) > return batch > client = plasma.connect('test', "", 0) > test1 = [1, 12, 23, 3, 21, 34] > test1 = pa.array(test1, pa.int32()) > batch = pa.RecordBatch.from_arrays([test1], ['FIELD1']) > key = "keynumber1keynumber1" > pid = plasma.ObjectID(bytearray(key,'UTF-8')) > sink = pa.MockOutputStream() > stream_writer = pa.RecordBatchStreamWriter(sink, batch.schema) > stream_writer.write_batch(batch) > stream_writer.close() > bff = client.create(pid, sink.size()) > stream = pa.FixedSizeBufferWriter(bff) > writer = pa.RecordBatchStreamWriter(stream, batch.schema) > writer.write_batch(batch) > client.seal(pid) > batch = retrieve1() > print(batch) > print(batch.schema) > print(batch[0]) > {code} > > Preliminary backtrace: > > {code} > CESS (code=1, address=0x111138158) > frame #0: 0x000000010e6457fc > lib.so`__pyx_pw_7pyarrow_3lib_10Int32Value_1as_py(_object*, _object*) + 28 > lib.so`__pyx_pw_7pyarrow_3lib_10Int32Value_1as_py: > -> 0x10e6457fc <+28>: movslq (%rdx,%rcx,4), %rdi > 0x10e645800 <+32>: callq 0x10e698170 ; symbol stub for: > PyInt_FromLong > 0x10e645805 <+37>: testq %rax, %rax > 0x10e645808 <+40>: je 0x10e64580c ; <+44> > (lldb) bt > * thread #1: tid = 0xf1378e, 0x000000010e6457fc > lib.so`__pyx_pw_7pyarrow_3lib_10Int32Value_1as_py(_object*, _object*) + 28, > queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, > address=0x111138158) > * frame #0: 0x000000010e6457fc > lib.so`__pyx_pw_7pyarrow_3lib_10Int32Value_1as_py(_object*, _object*) + 28 > frame #1: 0x000000010e5ccd35 lib.so`__Pyx_PyObject_CallNoArg(_object*) + > 133 > frame #2: 0x000000010e613b25 > lib.so`__pyx_pw_7pyarrow_3lib_10ArrayValue_3__repr__(_object*) + 933 > frame #3: 0x000000010c2f83bc libpython2.7.dylib`PyObject_Repr + 60 > frame #4: 0x000000010c35f651 libpython2.7.dylib`PyEval_EvalFrameEx + 22305 > {code} -- This message was sent by Atlassian JIRA (v7.6.3#76005)