how to get descriptive error messages from embedded cassandra - cassandra

Question

I am using embedded cassandra to run unit tests. I notice that if any cql statements fail, then I don't see any descriptive reason for failure. For eg. I am running the following two statements which fails because I am trying to add a table without switching to a keyspace
val statement1 =
"""
|CREATE KEYSPACE test
| WITH REPLICATION = {
| 'class' : 'SimpleStrategy',
| 'replication_factor' : 1
| };
""".stripMargin
val statement3 =
"""
|CREATE TABLE users (
| bucket int,
| email text,
| firstname text,
| lastname text,
| authprovider text,
| password text,
| confirmed boolean,
| id UUID,
| hasher text,
| salt text,
| PRIMARY KEY ((bucket, email), authprovider,firstname, lastname) )
""".stripMargin
val cqlStatements:CqlStatements = new CqlStatements(statement1,statement3)
")
val testCassandra = repoTestEnv.testCassandra
try {
testCassandra.start()
testCassandra.executeScripts(cqlStatements)
} finally testCassandra.stop()
But I don't see correct error. I see the following which doesn't tell exactly what is the problem
[info] c.g.n.e.c.l.WindowsCassandraNode - Apache Cassandra Node '7276' is started
[info] c.g.n.e.c.l.LocalCassandraDatabase - Apache Cassandra '3.11.1' is started (20811 ms)
[warn] c.d.d.c.Connection - /127.0.0.1:9042 did not send an authentication challenge; This is suspicious because the driver expects authentication (configured auth provider = com.datastax.driver.core.PlainTextAuthProvider)
[warn] c.d.d.c.Connection - /127.0.0.1:9042 did not send an authentication challenge; This is suspicious because the driver expects authentication (configured auth provider = com.datastax.driver.core.PlainTextAuthProvider)
[debug] c.g.n.e.c.t.u.CqlUtils - Executing Script: CqlStatements [
CREATE KEYSPACE test
WITH REPLICATION = {
'class' : 'SimpleStrategy',
'replication_factor' : 1
};
,
CREATE TABLE users (
bucket int,
email text,
firstname text,
lastname text,
authprovider text,
password text,
confirmed boolean,
id UUID,
hasher text,
salt text,
PRIMARY KEY ((bucket, email), authprovider,firstname, lastname) )
]
[debug] c.g.n.e.c.t.u.CqlUtils - Executing Statement:
CREATE KEYSPACE test
WITH REPLICATION = {
'class' : 'SimpleStrategy',
'replication_factor' : 1
};
[info] c.g.n.e.c.Cassandra - INFO [Native-Transport-Requests-1] 2019-05-29 07:50:00,788 MigrationManager.java:310 - Create new Keyspace: KeyspaceMetadata{name=test, params=KeyspaceParams{durable_writes=true, replication=ReplicationParams{class=org.apache.cassandra.locator.SimpleStrategy, replication_factor=1}}, tables=[], views=[], functions=[], types=[]}
[debug] c.g.n.e.c.t.u.CqlUtils - Executing Statement:
CREATE TABLE users (
bucket int,
email text,
firstname text,
lastname text,
authprovider text,
password text,
confirmed boolean,
id UUID,
hasher text,
salt text,
PRIMARY KEY ((bucket, email), authprovider,firstname, lastname) )
[debug] c.g.n.e.c.t.TestCassandra - Stop TestCassandra 3.11.1
[info] c.g.n.e.c.l.LocalCassandraDatabase - Stop Apache Cassandra '3.11.1'
[debug] c.g.n.e.c.l.RunProcess - Execute 'powershell -ExecutionPolicy Unrestricted C:\Users\manu\AppData\Local\Temp\embedded-cassandra\3.11.1\0d155e04-97d5-4927-87ac-d46824a77c32\bin\stop-server.ps1 -p C:\Users\manu\AppData\Local\Temp\embedded-cassandra\3.11.1\0d155e04-97d5-4927-87ac-d46824a77c32\1da63488-2624-4141-a49e-174203b7edc4' within a directory 'C:\Users\manu\AppData\Local\Temp\embedded-cassandra\3.11.1\0d155e04-97d5-4927-87ac-d46824a77c32'
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:03,926 HintsService.java:220 - Paused hints dispatch
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:03,933 Server.java:176 - Stop listening for CQL clients
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:03,934 Gossiper.java:1532 - Announcing shutdown
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:03,938 StorageService.java:2268 - Node localhost/127.0.0.1 state jump to shutdown
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:05,941 MessagingService.java:984 - Waiting for messaging service to quiesce
[info] c.g.n.e.c.Cassandra - INFO [ACCEPT-localhost/127.0.0.1] 2019-05-29 07:50:05,948 MessagingService.java:1338 - MessagingService has terminated the accept() thread
[info] c.g.n.e.c.Cassandra - INFO [StorageServiceShutdownHook] 2019-05-29 07:50:06,076 HintsService.java:220 - Paused hints dispatch
[info] c.g.n.e.c.l.WindowsCassandraNode - Successfully sent ctrl+c to process with id: 7276.
[info] c.g.n.e.c.l.WindowsCassandraNode - Apache Cassandra Node '7276' is stopped
[info] c.g.n.e.c.l.LocalCassandraDatabase - Apache Cassandra '3.11.1' is stopped (3490 ms)
[info] c.g.n.e.c.l.LocalCassandraDatabase - The working directory 'C:\Users\manu\AppData\Local\Temp\embedded-cassandra\3.11.1\0d155e04-97d5-4927-87ac-d46824a77c32' was deleted.
[debug] c.g.n.e.c.t.TestCassandra - TestCassandra 3.11.1 is stopped
Unable to start TestCassandra 3.11.1
com.github.nosan.embedded.cassandra.CassandraException: Unable to start TestCassandra 3.11.1
at com.github.nosan.embedded.cassandra.test.TestCassandra.start(TestCassandra.java:128)
at UnitSpecs.RepositorySpecs.UsersRepositorySpecs.$anonfun$new$3(UsersRepositorySpecs.scala:146)
at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
Ideally I should get the error similar to what I would get if I was using cqlsh
Is there a way to get more descriptive errors?

Answer 1

I have tried to reproduce your issue, but no luck.
import com.github.nosan.embedded.cassandra.cql.CqlScript;
import com.github.nosan.embedded.cassandra.test.TestCassandra;
class Scratch {
public static void main(String[] args) {
TestCassandra testCassandra = new TestCassandra(CqlScript.statements(createKeyspace(),
createUserTable()));
testCassandra.start();
try {
System.out.println(testCassandra.getSettings());
}
finally {
testCassandra.stop();
}
}
private static String createUserTable() {
return "CREATE TABLE users ( bucket int, "
+ "email text, "
+ "firstname text, "
+ "lastname text, "
+ "authprovider text, "
+ "password text, "
+ "confirmed boolean, "
+ "id UUID, hasher text, "
+ "salt text, "
+ "PRIMARY KEY ((bucket, email), authprovider,firstname, lastname) )";
}
private static String createKeyspace() {
return "CREATE KEYSPACE test WITH REPLICATION = {'class' : 'SimpleStrategy', 'replication_factor' : 1}";
}
}
Output:
Exception in thread "main" com.github.nosan.embedded.cassandra.CassandraException: Unable to start TestCassandra 3.11.4
at com.github.nosan.embedded.cassandra.test.TestCassandra.start(TestCassandra.java:156)
at com.github.nosan.embedded.cassandra.Scratch.main(Scratch.java:27)
Caused by: com.datastax.oss.driver.api.core.servererrors.InvalidQueryException: No keyspace has been specified. USE a keyspace, or explicitly specify keyspace.tablename
at com.datastax.oss.driver.api.core.servererrors.InvalidQueryException.copy(InvalidQueryException.java:48)
at com.datastax.oss.driver.internal.core.util.concurrent.CompletableFutures.getUninterruptibly(CompletableFutures.java:113)
at com.datastax.oss.driver.internal.core.cql.CqlRequestSyncProcessor.process(CqlRequestSyncProcessor.java:53)
at com.datastax.oss.driver.internal.core.cql.CqlRequestSyncProcessor.process(CqlRequestSyncProcessor.java:30)
at com.datastax.oss.driver.internal.core.session.DefaultSession.execute(DefaultSession.java:207)
at com.datastax.oss.driver.api.core.CqlSession.execute(CqlSession.java:47)
at com.datastax.oss.driver.api.core.CqlSession.execute(CqlSession.java:56)
at com.github.nosan.embedded.cassandra.test.util.CqlUtils.execute(CqlUtils.java:68)
at com.github.nosan.embedded.cassandra.test.util.CqlUtils.execute(CqlUtils.java:47)
at com.github.nosan.embedded.cassandra.test.util.CqlSessionUtils.execute(CqlSessionUtils.java:43)
at com.github.nosan.embedded.cassandra.test.CqlSessionConnection.execute(CqlSessionConnection.java:60)
at com.github.nosan.embedded.cassandra.test.DefaultConnection.execute(DefaultConnection.java:53)
at com.github.nosan.embedded.cassandra.test.TestCassandra.executeScripts(TestCassandra.java:256)
at com.github.nosan.embedded.cassandra.test.TestCassandra.doStart(TestCassandra.java:285)
at com.github.nosan.embedded.cassandra.test.TestCassandra.start(TestCassandra.java:147)

Answer 2

I haven't been able to find my Caused isn't printed but I have found this workaround
try {
testCassandra.start()
println(s"cassandra state is ${testCassandra.getState}")
testCassandra.executeScripts(cqlStatements)
//println(s"result of execution is ${result}")
//val settings = testCassandra.getSettings
//println(s"settings are ${settings}")
} catch {
case e:Exception => {
println(s"exception ${e} caused by ${e.getCause}")
//println(s"caused by ${e.getCause()}")
fail( new Throwable(e.getCause))
}
}finally {
testCassandra.stop()
}
the above prints
org.scalatest.exceptions.TestFailedException was thrown.
ScalaTestFailureLocation: UnitSpecs.RepositorySpecs.UsersRepositorySpecs at (UsersRepositorySpecs.scala:157)
...
Caused by: java.lang.Throwable: com.datastax.driver.core.exceptions.InvalidQueryException: No keyspace has been specified. USE a keyspace, or explicitly specify keyspace.tablename

Answer 3

I found the reason. I wasn't using TestCassandra correctly it seems. I didn't realize that if I create TestCassandra and also specify the cql statements at time of instantiation, the start method runs the queries as well. In my code, I was creating TestCassandra as follows
new TestCassandra(factory,cqlStatements)})
and was calling both start and executeScripts
testCassandra.start()
testCassandra.executeScripts(cqlStatements)
I commented that executeScripts line and I now see both Exception and Caused
I think it would be better if the APIs clearly mention that start has side effect of executing statements as well.