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How to resolve error "BTree::Exception: Node::readLE failure" on a Splunk forwarder?

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One of our Splunk forwarders has stopped forwarding anything to the Indexer. End of /opt/splunkforwarder/var/log/splunk/splunkd.log looks like this (after restart): ... 08-17-2016 16:25:09.384 -0700 INFO TailingProcessor - Adding watch on path: /var/c3d/logs/prod/tunnelconnect.log. 08-17-2016 16:25:09.384 -0700 INFO BatchReader - State transitioning from 2 to 0 (initOrResume). 08-17-2016 16:25:09.386 -0700 ERROR BTree - unable to reader 4088 bytes: bytes=4080 Success 08-17-2016 16:25:09.386 -0700 ERROR TailingProcessor - Ignoring path="/opt/splunkforwarder/etc/splunk.version" due to: BTree::Exception: Node::readLE failure in Node::Node(1) node offset: 4112 order: 255 keys: { } children: { } 08-17-2016 16:25:09.389 -0700 ERROR BTree - unable to reader 4088 bytes: bytes=0 Success 08-17-2016 16:25:09.389 -0700 ERROR TailingProcessor - Ignoring path="/var/c3d/logs/dev3/install.log" due to: BTree::Exception: Node::readLE failure in Node::Node(1) node offset: 8200 order: 255 keys: { } children: { } 08-17-2016 16:25:09.436 -0700 ERROR BTree - unable to reader 4088 bytes: bytes=0 Success 08-17-2016 16:25:09.436 -0700 ERROR TailingProcessor - Ignoring path="/opt/splunkforwarder/var/log/splunk/metrics.log.3" due to: BTree::Exception: Node::readLE failure in Node::Node(1) node offset: 8200 order: 255 keys: { } children: { } ... [many lines like this!] ... 08-17-2016 16:25:11.634 -0700 ERROR BTree - unable to reader 4088 bytes: bytes=0 Success 08-17-2016 16:25:11.634 -0700 ERROR TailingProcessor - Ignoring path="[one of our log file path here]" due to: BTree::Exception: Node::readLE failure in Node::Node(1) node offset: 8200 order: 255 keys: { } children: { } 08-17-2016 16:26:09.333 -0700 INFO TcpOutputProc - Connected to idx=[removed] using ACK.

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