Cluster does not repond to new SELECT query after a timeout

Hello,

We encounter the following issue three times. Here are the descriptions of the issue:

• data are imported via Datastax Java driver (DJD) v2.0.0-b2 with BatchStatement (i.e.: batch of PreparedStatement). The performance is quite impressive.
• if we query the cluster via cqlsh (C* 2.0.x) and DJD v1.0.4, everything goes well.
• but when we use DJD v2.0.0-b2, we got an exception:

  com.datastax.driver.core.exceptions.ReadTimeoutException: Cassandra timeout during read query at consistency ONE (1 responses were required but only 0 replica responded)

• afterward, no Select query works anymore:
  • all query via cqlsh failed with rpc_timeout
  • all query via DJD v1.0.4 failed with the same exception as the v2.0.0-b2
  • these queries have worked perfectly before the first select with DJD v2.0.0
• nodetool status shows all nodes still Up and Normal
• nodetool flush still works on all nodes

Only a reboot of all nodes could solve the issue.
Unfortunately, we don't have any exploitable informations in log files:
Node1: the handshaking at 11:28:48 is strange because we didn't reboot any node

INFO [MemoryMeter:1] 2013-11-15 11:27:11,724 Memtable.java (line 444) CFS(Keyspace='hector', ColumnFamily='pdl_caching') liveRatio is 5.06951175012658 (just-counted was 4.902669365509605). calculation took 140ms for 57108 columns
INFO [HANDSHAKE-/10.30.226.166] 2013-11-15 11:28:48,550 OutboundTcpConnection.java (line 386) Handshaking version with /10.30.226.166
INFO [RMI TCP Connection(4)-10.30.224.229] 2013-11-15 11:32:29,256 ColumnFamilyStore.java (line 734) Enqueuing flush of Memtable-sstable_activity@2142066849(0/0 serialized/live bytes, 24 ops)
INFO [FlushWriter:76] 2013-11-15 11:32:29,257 Memtable.java (line 328) Writing Memtable-sstable_activity@2142066849(0/0 serialized/live bytes, 24 ops)

Node2: there is a hinted-handoff at 11:30:02...

INFO [MemoryMeter:1] 2013-11-15 11:25:32,897 Memtable.java (line 444) CFS(Keyspace='hector', ColumnFamily='pdl_identity') liveRatio is 6.046071792095967 (just-counted was 5.493829833297251). calculation took 3ms for 608 columns
INFO [HintedHandoff:1] 2013-11-15 11:30:02,656 HintedHandOffManager.java (line 322) Started hinted handoff for host: 2ce9f0a8-795c-4733-9d52-06057fcc690d with IP: /10.30.227.8
INFO [HintedHandoff:1] 2013-11-15 11:30:12,663 HintedHandOffManager.java (line 449) Timed out replaying hints to /10.30.227.8; aborting (0 delivered)
INFO [RMI TCP Connection(6)-10.30.224.229] 2013-11-15 11:35:20,096 ColumnFamilyStore.java (line 734) Enqueuing flush of Memtable-hints@581765413(1028/10280 serialized/live bytes, 2 ops)

It seems that the first Select query with DJD v2.0.0-b2 let the cluster in a "pending"/"anormal" state and it no longer responds to future queries.

I know that without logs it will be hard to reproduce.

Thanks and regards,
Minh