Fix a bug where a missing node would cause WAN stats to time out.
Fix a bug where a missing node would cause WAN stats to time out.

ingted/voltdb,kumarrus/voltdb,VoltDB/voltdb,migue/voltdb,zuowang/voltdb,paulmartel/voltdb,kobronson/cs-voltdb,zuowang/voltdb,wolffcm/voltdb,ingted/voltdb,wolffcm/voltdb,kumarrus/voltdb,deerwalk/voltdb,kobronson/cs-voltdb,simonzhangsm/voltdb,paulmartel/voltdb,kobronson/cs-voltdb,flybird119/voltdb,ingted/voltdb,wolffcm/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,creative-quant/voltdb,creative-quant/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,migue/voltdb,deerwalk/voltdb,deerwalk/voltdb,ingted/voltdb,migue/voltdb,ingted/voltdb,flybird119/voltdb,VoltDB/voltdb,kobronson/cs-voltdb,zuowang/voltdb,kumarrus/voltdb,paulmartel/voltdb,paulmartel/voltdb,paulmartel/voltdb,VoltDB/voltdb,kumarrus/voltdb,VoltDB/voltdb,zuowang/voltdb,paulmartel/voltdb,VoltDB/voltdb,flybird119/voltdb,wolffcm/voltdb,flybird119/voltdb,wolffcm/voltdb,deerwalk/voltdb,zuowang/voltdb,kumarrus/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,paulmartel/voltdb,ingted/voltdb,ingted/voltdb,zuowang/voltdb,creative-quant/voltdb,kobronson/cs-voltdb,migue/voltdb,kumarrus/voltdb,wolffcm/voltdb,kobronson/cs-voltdb,deerwalk/voltdb,wolffcm/voltdb,migue/voltdb,zuowang/voltdb,flybird119/voltdb,creative-quant/voltdb,wolffcm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,creative-quant/voltdb,zuowang/voltdb,flybird119/voltdb,creative-quant/voltdb,creative-quant/voltdb,kobronson/cs-voltdb,migue/voltdb,deerwalk/voltdb,deerwalk/voltdb,VoltDB/voltdb,kobronson/cs-voltdb,ingted/voltdb,flybird119/voltdb,migue/voltdb,flybird119/voltdb,VoltDB/voltdb,migue/voltdb