fix fault-tolerance and error reporting to handle disk failures
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-0 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-0
new file mode 100755
index 0000000..d135b86
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-0
@@ -0,0 +1,10 @@
+0	0.008290140026154316
+2	0.14646839195826472
+4	0.03976979906329426
+6	0.015736276824953852
+8	0.010628239626209894
+10	0.008290140026154316
+12	0.14646839195826472
+14	0.03976979906329426
+16	0.015736276824953852
+18	0.010628239626209894
diff --git a/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-1 b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-1
new file mode 100755
index 0000000..d3badee
--- /dev/null
+++ b/pregelix/pregelix-example/src/test/resources/expected/PageRankReal2/part-1
@@ -0,0 +1,10 @@
+1	0.15351528192471647
+3	0.08125113985998214
+5	0.0225041581462058
+7	0.012542224114863661
+9	0.009294348455354817
+11	0.15351528192471647
+13	0.08125113985998214
+15	0.0225041581462058
+17	0.012542224114863661
+19	0.009294348455354817