[
https://issues.apache.org/jira/browse/CASSANDRA-13592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16064405#comment-16064405
]
ZhaoYang edited comment on CASSANDRA-13592 at 6/27/17 8:43 AM:
---------------------------------------------------------------
In Json path, the bytebuffer is being consumed with position = capacity. So in
page-state, no partition key bytes are written.
Using bf.duplicate() would fix this issue.
{code}
public static List<ByteBuffer> rowToJson(List<ByteBuffer> row,
ProtocolVersion protocolVersion, ResultSet.ResultMetadata metadata)
{
StringBuilder sb = new StringBuilder("{");
for (int i = 0; i < metadata.names.size(); i++)
{
if (i > 0)
sb.append(", ");
ColumnSpecification spec = metadata.names.get(i);
String columnName = spec.name.toString();
if (!columnName.equals(columnName.toLowerCase(Locale.US)))
columnName = "\"" + columnName + "\"";
ByteBuffer buffer = row.get(i);
sb.append('"');
sb.append(Json.quoteAsJsonString(columnName));
sb.append("\": ");
if (buffer == null)
sb.append("null");
else
// use duplicate() to avoid buffer being consumed
sb.append(spec.type.toJSONString(buffer.duplicate(),
protocolVersion));
}
sb.append("}");
return
Collections.singletonList(UTF8Type.instance.getSerializer().serialize(sb.toString()));
}
{code}
was (Author: jasonstack):
it seems like driver issue.. it swallowed the keys paging state..
> Null Pointer exception at SELECT JSON statement
> -----------------------------------------------
>
> Key: CASSANDRA-13592
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13592
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: Debian Linux
> Reporter: Wyss Philipp
> Labels: beginner
> Attachments: system.log
>
>
> A Nulll pointer exception appears when the command
> {code}
> SELECT JSON * FROM examples.basic;
> ---MORE---
> <Error from server: code=0000 [Server error]
> message="java.lang.NullPointerException">
> Examples.basic has the following description (DESC examples.basic;):
> CREATE TABLE examples.basic (
> key frozen<tuple<uuid, int>> PRIMARY KEY,
> wert text
> ) WITH bloom_filter_fp_chance = 0.01
> AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'}
> AND comment = ''
> AND compaction = {'class':
> 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy',
> 'max_threshold': '32', 'min_threshold': '4'}
> AND compression = {'chunk_length_in_kb': '64', 'class':
> 'org.apache.cassandra.io.compress.LZ4Compressor'}
> AND crc_check_chance = 1.0
> AND dclocal_read_repair_chance = 0.1
> AND default_time_to_live = 0
> AND gc_grace_seconds = 864000
> AND max_index_interval = 2048
> AND memtable_flush_period_in_ms = 0
> AND min_index_interval = 128
> AND read_repair_chance = 0.0
> AND speculative_retry = '99PERCENTILE';
> {code}
> The error appears after the ---MORE--- line.
> The field "wert" has a JSON formatted string.
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org
For additional commands, e-mail: commits-h...@cassandra.apache.org
