Topic: Debugging bitcoind crash when calling sendmany JSON-RPC command (Read 1694 times)

How are your using this code?
Because i'm somewhat new but I can know that your are not typing this in the command line.

So it has to be a bash script, or maybe python, or which method are you using?
I have a problem and I'm using  jsonrpcphp library to sendmany but it is not working.... I could easily change library or go other way....
any words are appreciated

After running with an increased passphrase timeout for the past few days, we have not seen any problems. No more bitcoind crashes, and no more "code: -4, 'Transaction creation failed'" errors.

Specifically, we are now running the code:


We noticed that sometimes the sendmany command was taking close to 20 seconds, so to be on the safe side, we increased the timeout to 60.

We couldn't seem to find and existing bug report on this issue though. We're planning on collecting some more data, and then submitting a proper bug report.

Sounds good! I will recompile bitcoind with debug symbols included, and try to get a better backtrace.

In the meantime, I will continue to leave things running with a longer wallet unlock timeout for the next few days, or until another crash occurs, since that does seem to be a promising lead.

Thanks again for the help!

What can I say? Rebuid your bitcoind without stripping the debug symbols. The default makefile.unix already has "-g" to enable debugging.

I just got a core dump. Unfortunately, my bitcoind isn't compiled with debugging symbols. So, when I run the gdb command, I see this message:


The backtrace I get is:


As you can see, not too useful :/

Please let me know if there is anything I can do to help make this more useful.


That would actually make a lot of sense, given the fact that we usually see crashes during high traffic times - which would probably be when bitcoind would take longer to respond. We will try increasing the wallet unlock time from 5 to 20 and see if the crashing behavior is fixed. Is there a bug report that you know of for this bug, so we can track it?

Thanks!

I'm pretty sure bitcoind crashes when "walletpassphrase" timeout while "sendmany" is doing it's job.

I can't test it right now, but as far as I remember then 0.7 had this problem (and I don't think it's fixed in 0.8 ).

Thanks for the help! We've followed your instructions, and now we're now awaiting a core dump. It usually happens about once a day, so hopefully we don't have to wait too long.

before invoking bitcoind is your friend. Then wait for the crash and do the postmortem:. Post the results.

Recently we have run into a problem with bitcoind crashing on us. After looking into the problem, we have found that the crashes always occur directly after our system issues a `sendmany` JSON-RPC command.

When sending out bitcoins, our system issues the following JSON-RPC commands:


After the sendmany command, we occasionally see an error code: "-4", with the message: "Transaction creation failed". However, we also occasionally see a complete crash of bitcoind.

The crashes typically occur when our system is under higher load, and processing a higher volume of deposits and withdrawals. However, we can't really find any strong causation - other than the fact that it always occurs after a sendmany call.

These crashes seemed to occur after upgrading to 0.8. We are currently running 0.8.1, and are still experiencing the problem. However, it is difficult to tell if 0.8 is the culprit, or we just happened to scale to a sufficient size at around the same time we upgraded to 0.8.

We would like to help debug this issue, however, to be honest, we don't really know where to start. So, my questions are:

- Is this a known issue, or has anyone else experienced it? If so, are there any known work-arounds?

- How can we help to get to the bottom of this issue? Ideally, we'd either find what we're doing wrong to cause bitcoind to crash, or we'd help find the bug in bitcoind so it can be patched, and more resilient to whatever is causing this issue.

Thanks!