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KDB file numbering for one or more engines moves into the negatives. This may manifest in:
For example, if the process execution01 engine is the one in question, you would notice a negative .kdb file in <APPIAN_HOME>/server/process/exec/01/gw1/:
<APPIAN_HOME>/server/process/exec/01/gw1/
pe-2147483646.kdb
The gw_PX001 log will show something like this:
[PX001] INFO .a.gw.ssa "Server switchover to database ID -2147483646"
The db_PX001 log will show something like this:
[PX001] {pe-2147483646.kdb ,4405}
This issue can occur after improperly resetting a particular engine's KDBs or if extraneous KDB files are manually introduced.
Warning: Renaming .kdb files is not supported beyond what is documented in this article.
Last Reviewed: November 2017