How do I recover from "Invalid log entry in replay" when transaction log is being replayed during server start? Error Condition A Virtuoso transaction log file may fail to replay, with an error of the form: 11:42:57 Invalid log entry in replay. Delete transaction log virtuoso.trx or truncate at point of error. Valid data may exist after this record. A log record begins with bytes 193 188 5 188 0. Error at offset 13205546 11:42:57 Searching for the next valid header signature starting at 13205547 11:42:57 No valid looking header found. 11:42:57 Server exiting Resolution of this error varies with the kind of Virtuoso server you're running. Recovery Methods Single-Server Deployments of both Open Source and Commercial Edition WARNING: Do not use this recovery method on Cluster Deployments of Commercial Edition.This can be recovered by truncating to the transaction log to the reported error offset. Unix-like OS can use the built-in dd command; Windows users must first install WinDD or cygwin to get the same functionality. Given the error above, the recovery steps on a Unix-like OS would look like -- # mv virtuoso.trx old.trx # dd if=old.trx of=new.trx bs=1 count=13205546 13205546+0 records in 13205546+0 records out # mv new.trx virtuoso.trx # virtuoso-iodbc-t -f Restarting Virtuoso should now succeed. Replication Cluster Deployments of Commercial Edition Recovery instructions coming soon! Until then, please contact Support for assistance. Elastic Cluster Deployments of Commercial Edition Recovery instructions coming soon! Until then, please contact Support for assistance.