"no such path" exception during git fallback on blame calculation

2015-10-26 14:13:44,551 DEBUG [IncrPing2 G-httpd ] fisheye DvcsProcessMonitor-onAfterFinished - Finished process: git blame -l -p 21003d443408b69ae6c82de7aef81c68a7b24
20c -- httpd-trunk/LAYOUT took 102ms
2015-10-26 14:13:44,552 WARN  [IncrPing2 G-httpd ] fisheye BaseRepositoryScanner-handleSlurpException - Problem processing revisions from repo G-httpd due to class com
.cenqua.fisheye.rep.DbException - com.atlassian.fisheye.dvcs.handler.DvcsProcessException: Error while communicating with VCS: fatal: no such path httpd-trunk/LAYOUT i
n 21003d443408b69ae6c82de7aef81c68a7b2420c

com.cenqua.fisheye.rep.DbException: com.atlassian.fisheye.dvcs.handler.DvcsProcessException: Error while communicating with VCS: fatal: no such path httpd-trunk/LAYOUT
 in 21003d443408b69ae6c82de7aef81c68a7b2420c

        at com.atlassian.fisheye.git.GitCache.getBlameFallback(GitCache.java:216) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.calcBlameFromScm(BaseBlameAndLinecountCalculator.java:392) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.calcBlame(BaseBlameAndLinecountCalculator.java:281) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.calculateRevisionData(BaseBlameAndLinecountCalculator.java:177) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.calculateAndStoreRevisionData(BaseBlameAndLinecountCalculator.java:162) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.indexRevisions(BaseBlameAndLinecountCalculator.java:146) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseBlameAndLinecountCalculator.calcBlame(BaseBlameAndLinecountCalculator.java:82) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.LifecycleRepositoryScanner.slurpRepository(LifecycleRepositoryScanner.java:127) [fisheye.jar:?]
        at com.atlassian.fisheye.git.GitScanner.slurpRepository(GitScanner.java:1575) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.LifecycleRepositoryScanner.doSlurpTransaction(LifecycleRepositoryScanner.java:49) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseRepositoryScanner.ping(BaseRepositoryScanner.java:73) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.BaseRepositoryEngine.doSlurp(BaseRepositoryEngine.java:86) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.RepositoryEngine.slurp(RepositoryEngine.java:414) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.ping.IndexingPingRequest.doRequest(IndexingPingRequest.java:27) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.ping.IncrementalPingRequest.doRequest(IncrementalPingRequest.java:30) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.ping.PingRequest$1.run(PingRequest.java:55) [fisheye.jar:?]
        at com.cenqua.fisheye.util.NamedExecution.run(NamedExecution.java:27) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.ping.PingRequest.process(PingRequest.java:52) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.RepositoryHandle.processPingRequests(RepositoryHandle.java:217) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.RepositoryHandle.access$100(RepositoryHandle.java:59) [fisheye.jar:?]
        at com.cenqua.fisheye.rep.RepositoryHandle$2.run(RepositoryHandle.java:173) [fisheye.jar:?]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_45-internal]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_45-internal]
        at java.lang.Thread.run(Thread.java:745) [?:1.8.0_45-internal]
Caused by: com.atlassian.fisheye.dvcs.handler.DvcsProcessException: Error while communicating with VCS: fatal: no such path httpd-trunk/LAYOUT in 21003d443408b69ae6c82
de7aef81c68a7b2420c

        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeWithInput(DvcsContext.java:226) [fisheye.jar:?]
        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeCommand(DvcsContext.java:212) [fisheye.jar:?]
        at com.atlassian.fisheye.git.GitCache.getBlameFallback(GitCache.java:185) [fisheye.jar:?]
        ... 23 more
Caused by: com.atlassian.utils.process.ProcessException: While executing: "git blame -l -p 21003d443408b69ae6c82de7aef81c68a7b2420c -- httpd-trunk/LAYOUT" in [/ssd/dis
ts/blamevalidation/var/cache/G-httpd/clone]
        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeCommand(DvcsContext.java:261) [fisheye.jar:?]
        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeCommand(DvcsContext.java:235) [fisheye.jar:?]
        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeWithInput(DvcsContext.java:224) [fisheye.jar:?]
        ... 25 more
Caused by: com.atlassian.utils.process.ProcessException: Non-zero exit code: 128
        at com.atlassian.utils.process.PluggableProcessHandler.complete(PluggableProcessHandler.java:69) [atlassian-processutils-1.5.14.jar:?]
        at com.atlassian.utils.process.ExternalProcessImpl.wrapUpProcess(ExternalProcessImpl.java:509) [atlassian-processutils-1.5.14.jar:?]
        at com.atlassian.utils.process.ExternalProcessImpl.finish(ExternalProcessImpl.java:423) [atlassian-processutils-1.5.14.jar:?]
        at com.atlassian.utils.process.ExternalProcessImpl.execute(ExternalProcessImpl.java:378) [atlassian-processutils-1.5.14.jar:?]
        at com.atlassian.fisheye.dvcs.client.DvcsContext.executeCommand(DvcsContext.java:248) [fisheye.jar:?]
        ... 27 more
2015-10-26 14:13:44,553 DEBUG [IncrPing2 G-httpd ] fisheye RepositoryStatus-setEngineError - Engine Error Set [G-httpd]: Repository index failed due to error
    com.cenqua.fisheye.rep.DbException: com.atlassian.fisheye.dvcs.handler.DvcsProcessException: Error while communicating with VCS: fatal: no such path httpd-trunk/LA
YOUT in 21003d443408b69ae6c82de7aef81c68a7b2420c

    com.atlassian.fisheye.dvcs.handler.DvcsProcessException: Error while communicating with VCS: fatal: no such path httpd-trunk/LAYOUT in 21003d443408b69ae6c82de7aef8
1c68a7b2420c

    com.atlassian.utils.process.ProcessException: While executing: "git blame -l -p 21003d443408b69ae6c82de7aef81c68a7b2420c -- httpd-trunk/LAYOUT" in [/ssd/dists/blam
evalidation/var/cache/G-httpd/clone]
    com.atlassian.utils.process.ProcessException: Non-zero exit code: 128
2015-10-26 14:13:44,553 DEBUG [IncrPing2 G-httpd ] fisheye LifecycleRepositoryScanner-doSlurpTransaction - Rolling back cache changes