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<p>Hi,</p>
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<p>We just hit a situation where it appeared that 1 scheduler was wedged. Some parts of our application were working, but others appeared to be stuck. I could connect via a cnode application and an escript, but I couldn't connect via the Erlang shell. We have
an escript that does rpc calls, some worked, others (e.g. anything to the code server or tracing failed) failed. </p>
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<p>CPU load was minimal at the time, and heart didn't complain. We only have a single NIF, but this is not called on this hardware variant. We do use CNODE to talk to C applications.</p>
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<p>We are running R17, Intel quad core CPU on Debian.</p>
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<p>This is the first time this has been seen, so the questions are:</p>
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<p>1. Has anyone seen this before?</p>
<p>2. What can we do if we hit this condition in the future to debug?</p>
<p>3. Since heart doesn't detect this can anyone think of any alternative mechanisms?</p>
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<p>Thanks</p>
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<p>Matt</p>
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