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Thread: VoltDB don't recover

  1. #1
    New Member
    Join Date
    Nov 2013
    Posts
    1

    VoltDB don't recover

    Hi all,

    we have a 4 node cluster that generates automatically a snapshot every 5 minutes. We tried to simulate a node failure and killed the java process on one node. Our k-factor is 2. The cluster was still working, but when we tried to rejoin the node with

    Code:
    voltdb rejoin host $NODE deployment $DEPLOYMENT_FILE
    the whole cluster crashed with the message

    Code:
    FATAL: Stored procedure EndVisit generated different SQL queries at different partitions. Shutting down to preserve data integrity.
    How can this happen? The corresponding procedure has a fixed number of fixed statements, that doesn't change at all.

    What even more problematic is, that the recovery didn't worked. The command

    Code:
    voltdb recover host $RUNNING_NODE deployment $DEPLOYMENT_FILE
    issued the messages

    Code:
    VoltDB has encountered an unrecoverable error and is exiting.
    Message: Found multiple transactions ids during restore for a partition.
    Have we done something wrong? Was there a misunderstanding?

    We are using VoltDB 3.7 and the OpenJDK Java 1.6 64-Bit.

    Best regards

  2. #2
    New Member
    Join Date
    Feb 2013
    Posts
    9
    Hi,

    Thanks for reaching out. I am sorry that you encountered a challenge in your testing. Since this is not the expected behavior, could you please send the VoltDB log files from all the machines in your cluster for us to take a look at to determine the root cause of the situation you are facing? You can reach out to me on my direct email address at dremella@voltdb.com.

    Thanks.

  3. #3
    New Member
    Join Date
    Nov 2013
    Posts
    10
    Hi,

    Thanks for your answer.
    I am working together with phifty on that project.
    Unfortunately we did not keep the log file. I will try to reproduce the error and send the log file to you.

    Best regards

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