crash in DiskIoMgr::GetFreeBuffer

Time	Log Level	Source	Log Message
May 16, 3:20:59.953 PM	ERROR	logging.cc:120	
stderr will be logged to this file.
May 16, 3:27:38.652 PM	ERROR	data-stream-sender.cc:261	
channel send status: 
Sender timed out waiting for receiver fragment instance: a045d3abcd1bed4f:a116563837c8ebda
May 16, 3:27:39.738 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:44.784 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:46.055 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:46.371 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:46.906 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:51.003 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:52.479 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-master-1-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:54.227 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:54.298 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-master-1-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:54.305 PM	ERROR	data-stream-sender.cc:261	
channel send status: 
Sender timed out waiting for receiver fragment instance: 7446d34d9eefb9f:436f61bcd3c78eb3
May 16, 3:27:55.022 PM	ERROR	data-stream-sender.cc:261	
channel send status: 
Sender timed out waiting for receiver fragment instance: b44445bcb782b5a4:5cef13b26af20aa1
May 16, 3:27:55.646 PM	ERROR	data-stream-sender.cc:261	
channel send status: 
Sender timed out waiting for receiver fragment instance: 3249c6494703ecc7:3b9186fbed00dc
May 16, 3:27:56.042 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:56.277 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-master-1-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:56.749 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-worker-6-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:57.126 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-master-1-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:27:59.030 PM	ERROR	data-stream-sender.cc:261	
channel send status: Couldn't open transport for ux-reporting-engine-master-1-prod-us-east-1a:22000 (connect() failed: Connection timed out)
May 16, 3:28:03.573 PM	ERROR	data-stream-sender.cc:261	
channel send status: 
Sender timed out waiting for receiver fragment instance: c64b22033608d609:10e070d34aa299dd