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Hi Tatiana, It's only a known issue in the sense that Jacek posted that error from you some day(s) in the past. We should open a ticket for it. My guess is that the error comes from intermediate results that trigger an error condition when when gathering back results from the cluster. It's likely due to a result type that we don't support(or don't properly support). If you are selecting blobs or varchars or binary or bit types, that could cause it, or maybe our code for handling zero-length values is broken. -Daniel On 01/22/2015 04:28 PM, Tatiana Goldina wrote: > Hello, > > I am encountering this once in a while. > > qserv-czar.log > > python: build/rproc/ProtoRowBuffer.cc:69: int lsst::qserv::rproc::escapeString(Iter, CIter, CIter) [with Iter = __gnu_cxx::__normal_iterator<char*, std::vector<char, std::allocator<char> > >, CIter = __gnu_cxx::__normal_iterator<const char*, std::basic_string<char, std::char_traits<char>, std::allocator<char> > >]: Assertion `srcBegin != srcEnd' failed. > > Czar is dead and qserv stops responding after that. > > > Is it a known issue? > > > Thank you! > > Tatiana > > ######################################################################## > Use REPLY-ALL to reply to list > > To unsubscribe from the QSERV-L list, click the following link: > https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the QSERV-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=QSERV-L&A=1