We've got this exception, when running DB Doctor in parallel on multiple DB files.
com.objectdb.o.UserException: Attempt to open a non existing file './tmp.E3Mwf13d7o/objectdb_7666012114926572695/DoctorSection_0.fls' at com.objectdb.o.MSG.a(MSG.java:64) at com.objectdb.o.LFL.x(LFL.java:809) at com.objectdb.o.TFM$a.x(TFM.java:255) at com.objectdb.o.LFL.x(LFL.java:779) at com.objectdb.o.LFL.y(LFL.java:767) at com.objectdb.o.VLV$a.<init>(VLV.java:423) at com.objectdb.o.VLV.g(VLV.java:345) at com.objectdb.o.VLV.h(VLV.java:321) at com.objectdb.o.VLV.e(VLV.java:289) at com.objectdb.o.SCV.b(SCV.java:94) at com.objectdb.o.DCM.q(DCM.java:544) at com.objectdb.o.DCM.p(DCM.java:285) at com.objectdb.o.DCM.j(DCM.java:183) at com.objectdb.Doctor.main(Doctor.java:22) Example command: tmpdir=$(mktemp -dp .) java -Xmx100G -Djava.io.tmpdir=$tmpdir -cp objectdb.jar com.objectdb.Doctor file1.odb fixed/file1.odb&\ java -Xmx100G -Djava.io.tmpdir=$tmpdir -cp objectdb.jar com.objectdb.Doctor file2.odb fixed/file2.odb&\ java -Xmx100G -Djava.io.tmpdir=$tmpdir -cp objectdb.jar com.objectdb.Doctor file3.odb fixed/file3.odb&\ java -Xmx100G -Djava.io.tmpdir=$tmpdir -cp objectdb.jar com.objectdb.Doctor file4.odb fixed/file4.odb&\
For us the solution seems to use different tmp directory for each file, but it still this looks like a bug to me.