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From "Turi, Ferenc (GE Power & Water, Non-GE)" <Ferenc.T...@ge.com>
Subject RE: Intermittent connection error
Date Thu, 21 Nov 2013 19:26:12 GMT
Hi,

Please attach the source to have deeper look at it.

Ferenc

From: Robert Wille [mailto:rwille@fold3.com]
Sent: Thursday, November 21, 2013 7:11 PM
To: user@cassandra.apache.org
Subject: Intermittent connection error

I intermittently get the following error when I try to execute my first query after connecting:

Caused by: com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried
for query failed (no host was tried)
                at com.datastax.driver.core.exceptions.NoHostAvailableException.copy(NoHostAvailableException.java:64)
                at com.datastax.driver.core.ResultSetFuture.extractCauseFromExecutionException(ResultSetFuture.java:271)
                at com.datastax.driver.core.ResultSetFuture.getUninterruptibly(ResultSetFuture.java:187)
                at com.datastax.driver.core.Session.execute(Session.java:126)
                at com.datastax.driver.core.Session.execute(Session.java:77)

The odd part is the "(no host was tried)". I definitely have provided it with a host, since
this exact same code works most of the time.

I don't know if this might be related to a question I posted earlier, which I haven't been
able to resolve yet. Whenever I issue a truncate command, I get the error "Unable to complete
request: one or more nodes were unavailable".

I've got a single node with all empty tables. It is definitely up and available, since most
of the time I can connect and do stuff (except truncate, which I can never do).

The only thing in the logs that looks relevant is this:

INFO [HANDSHAKE-/192.168.98.121] 2013-11-20 11:36:59,064 OutboundTcpConnection.java (line
386) Handshaking version with /192.168.98.121
INFO [HANDSHAKE-/192.168.98.121] 2013-11-20 11:37:04,064 OutboundTcpConnection.java (line
395) Cannot handshake version with /192.168.98.121

I'm running Cassandra 2.0.2.

Any help would be most appreciated.

Thanks

Robert

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