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I am writing a program about bitcoin mining. It calls the RPC method getblocktemplate every second. Sometimes bitcoind doesn't reply to my RPC getblocktemplate request, but bitcoind still accepted new transactions and downloaded new blocks, but RPC calls didn't work.

I checked the CPU and memory usage; both are fine. I am sure it is not the problem of my computer system, because I tried connecting to some other bitcoind. At first, they worked fine, but after running a long time, this problem would come again.

I did not find a good way to solve it. When the RPC request does not reply, I've tried restarting bitcoind, and then it worked again. My bitcoind version is 0.9.3. Any ideas?

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