Hi, i constantly came across this issue and i have to restart my bitcoind several times a day.
i run a bitcoind with version 0.8.6 on a linux machine, it usually failed to give JSON-RPC any response(TIMEOUT). when i check the process i found it hang with the call futex and have very high cpu load.
it will be helpful if anybody have any clue, thanks in advanced
Can you gdb into the process and give us a traceback for the thread(s) that hangs?
Also; anything unusual in the debug.log?
(gdb) info threads Id Target Id Frame 20 Thread 0x7f75e7ca5700 (LWP 27738) "bitcoind" 0x00007f75e88840fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 19 Thread 0x7f75e74a4700 (LWP 27739) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 18 Thread 0x7f75e6ca3700 (LWP 27740) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 17 Thread 0x7f75e64a2700 (LWP 27741) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 16 Thread 0x7f75e5ca1700 (LWP 27742) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 15 Thread 0x7f75e54a0700 (LWP 27743) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 14 Thread 0x7f75e4c9f700 (LWP 27744) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 13 Thread 0x7f75cffff700 (LWP 27745) "bitcoin-scriptc" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 12 Thread 0x7f75b7c76700 (LWP 27944) "bitcoind" 0x000000000079cda0 in ?? () 11 Thread 0x7f75b5438700 (LWP 27952) "bitcoin-net" 0x00007f75e7d93763 in select () from /lib/x86_64-linux-gnu/libc.so.6 10 Thread 0x7f75b4c37700 (LWP 27953) "bitcoin-addcon" 0x00007f75e88840fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 9 Thread 0x7f759ffff700 (LWP 27954) "bitcoin-opencon" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 8 Thread 0x7f759f7fe700 (LWP 27955) "bitcoin-msghand" 0x00000000007ac93c in ?? () 7 Thread 0x7f759effd700 (LWP 27956) "bitcoin-dumpadd" 0x00007f75e88840fe in pthread_cond_timedwait@@GLIBC_2.3---Type <return> to continue, or q <return> to quit--- .2 () from /lib/x86_64-linux-gnu/libpthread.so.0 6 Thread 0x7f759e7fc700 (LWP 27957) "bitcoind" 0x00007f75e7d9aa93 in epoll_wait () from /lib/x86_64-linux-gnu/libc.so.6 5 Thread 0x7f759dffb700 (LWP 27958) "bitcoind" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 4 Thread 0x7f759d7fa700 (LWP 27959) "bitcoind" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 3 Thread 0x7f759cff9700 (LWP 27960) "bitcoind" 0x00007f75e8883d84 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0 2 Thread 0x7f757ffff700 (LWP 27961) "bitcoin-wallet" 0x00007f75e88840fe in pthread_cond_timedwait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
2014-04-14 04:55:14 received block 0000000000000000e02dc60c31549ba43aa7a4d0ab9eb8abda030b80e26264eb 2014-04-14 04:55:14 ERROR: ProcessBlock() : already have block 270572 0000000000000000e02dc60c31549ba43aa7a4d0ab9eb8abda030b80e26264eb 2014-04-14 04:55:14 received block 00000000000000019d2c06191a81d51027b2d738552ebf8566219301dc800621 2014-04-14 04:55:14 ERROR: ProcessBlock() : already have block 270559 00000000000000019d2c06191a81d51027b2d738552ebf8566219301dc800621 2014-04-14 04:55:14 received block 0000000000000002890e15edd582772649775bbe7618c7fb7c7930d590b307e6 2014-04-14 04:55:16 SetBestChain: new best=0000000000000002890e15edd582772649775bbe7618c7fb7c7930d590b307e6 height=270609 log2_work=74.061637 tx=27447111 date=2013-11-20 13:11:37 progress=0.541591 2014-04-14 04:55:16 ProcessBlock: ACCEPTED 2014-04-14 04:55:16 received block 0000000000000002890e15edd582772649775bbe7618c7fb7c7930d590b307e6 2014-04-14 04:55:16 ERROR: ProcessBlock() : already have block 270609 0000000000000002890e15edd582772649775bbe7618c7fb7c7930d590b307e6 2014-04-14 04:55:16 received block 0000000000000001bc303de18d5fc8f3516d6226241a21164c7523914bc0410f 2014-04-14 04:55:16 ERROR: ProcessBlock() : already have block 270567 0000000000000001bc303de18d5fc8f3516d6226241a21164c7523914bc0410f 2014-04-14 04:55:16 received block 00000000000000057f124916e87fee0c7c5158f6395dba4830806644d91bada7 2014-04-14 04:55:16 ERROR: ProcessBlock() : already have block 270573 00000000000000057f124916e87fee0c7c5158f6395dba4830806644d91bada7 2014-04-14 04:55:16 received block 0000000000000002e1ce99bab8a494cda6000dce4b89fc8f8e6515a23d166818 2014-04-14 04:55:19 SetBestChain: new best=0000000000000002e1ce99bab8a494cda6000dce4b89fc8f8e6515a23d166818 height=270610 log2_work=74.061829 tx=27447443 date=2013-11-20 13:16:48 progress=0.541605 2014-04-14 04:55:19 ProcessBlock: ACCEPTED 2014-04-14 04:55:19 received block 0000000000000002e17bc0a5590b0608fa72d0e3a336c2d68a90c5d955716e93 2014-04-14 04:55:19 ERROR: ProcessBlock() : already have block 270568 0000000000000002e17bc0a5590b0608fa72d0e3a336c2d68a90c5d955716e93 2014-04-14 04:55:19 received block 00000000000000058813ca25de2d2d8821c4ae39dcdced5f63609c48d59ad0ce 2014-04-14 04:55:19 ERROR: ProcessBlock() : already have block 270560 00000000000000058813ca25de2d2d8821c4ae39dcdced5f63609c48d59ad0ce ^C
Above is the output when i list thread in gdb and the debug.log. hope this can help, i am happy to provide more info, thanks.