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With this SIGSEGV (Segmentation fault) error we were able to troubleshoot by debugging the code referenced in "Java frames:" subsection under THREAD section.
Therefore looking at Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
Code suggests the exception was thrown while trying to create a new thread, within the org.trippi.io.RIOTripleIterator. The code here was re-factored to use thread pooling instead of creating new threads each time, see here https://jira.duraspace.org/browse/FCREPO-873 for more info. This helped reduced the SIGSEGV errors significantly although not completely.
Edited by: 843727 on 18-Apr-2011 05:00