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ndb-bindings : JVM crash while tring to connect to NDB Cluster from java.
Posted by: Arun Kumar
Date: November 06, 2012 09:04PM

Hi All,

I have an Java application which is using ndb-bindings 0.7.1 to access NDB cluster.

I encountered an JVM crahs, when my application tried to connect to NDB CLuster.

Following is the steps followed:

1) NdbClusterConnection conn = NdbClusterConnection.create(serverUrl)
2) conn.connect(5, 3, true)
3) conn.waitUntilReady(5, 5);
4) Ndb ndb = conn.createNdb(dbName, 10);
5) NdbDictionary dictionary = ndb.getDictionary();
6) NdbTable table=dictionary.getTable(tableName);

JVM Crash happened at Step 6. Following is the JVM stack trace :

Stack: [0x0000000042eba000,0x0000000042edb000], sp=0x0000000042ed8c50, free space=123k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C [libndbclient.so.4+0x126173] my_stat+0x10d

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j com.mysql.cluster.ndbj.NdbjJNI.NdbDictionary_getTable(JLcom/mysql/cluster/ndbj/NdbDictionary;Ljava/lang/String;)J+0
j com.mysql.cluster.ndbj.NdbDictionary.getTable(Ljava/lang/String;)Lcom/mysql/cluster/ndbj/NdbTable;+6
j java.ndbclient.ndb.SchemaReader.readTableSchema(Ljava/lang/String;)Ljava/ndbclient/schema/EntitySchema;+31
j java.ndbclient.ndb.NdbConnection.readSchema()Ljava/util/Map;+71
j java.ndbclient.ndb.NdbConnection.connect()V+220
j java.ndbclient.ndb.NdbConnection.access$100(Ljava/ndbclient/ndb/NdbConnection;)V+1
j java.ndbclient.ndb.NdbConnection$BackgroupConnector.run()V+14

Can someone help me in identifying the reason for the crash and guide in the right direction for understanding this crash.

Also was this crash (or similar crash) encountered by anyone and was there any fix or workaround.


Your help & suggestion is greatly appreciated.

Thanks,
Arun

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ndb-bindings : JVM crash while tring to connect to NDB Cluster from java.
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