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| <div class="title">MetaStoreUtil.java</div> </div> |
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| <div class="contents"> |
| <a href="MetaStoreUtil_8java.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2012 Cloudera Inc.</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// limitations under the License.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="keyword">package </span>com.cloudera.impala.util;</div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">import</span> java.util.List;</div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> </div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="keyword">import</span> org.apache.hadoop.hive.conf.HiveConf;</div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="keyword">import</span> org.apache.hadoop.hive.metastore.HiveMetaStoreClient;</div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="keyword">import</span> org.apache.hadoop.hive.metastore.api.MetaException;</div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="keyword">import</span> org.apache.hadoop.hive.metastore.api.Partition;</div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="keyword">import</span> org.apache.log4j.Logger;</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">import</span> org.apache.thrift.TException;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">import</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsTable.html">com.cloudera.impala.catalog.HdfsTable</a>;</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">import</span> com.google.common.base.Preconditions;</div> |
| <div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="keyword">import</span> com.google.common.collect.Lists;</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html"> 33</a></span> <span class="keyword">public</span> <span class="keyword">class </span><a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html">MetaStoreUtil</a> {</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aa35de862ac75d360ba5296e9aad04581"> 34</a></span>  <span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">final</span> Logger <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aa35de862ac75d360ba5296e9aad04581">LOG</a> = Logger.getLogger(MetaStoreUtil.class);</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="comment">// The default maximum number of partitions to fetch from the Hive metastore in one</span></div> |
| <div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="comment">// RPC.</span></div> |
| <div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8"> 38</a></span>  <span class="keyword">private</span> <span class="keyword">final</span> <span class="keyword">static</span> <span class="keywordtype">short</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8">DEFAULT_MAX_PARTITIONS_PER_RPC</a> = 1000;</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// The maximum number of partitions to fetch from the metastore in one RPC.</span></div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="comment">// Read from the 'hive.metastore.batch.retrieve.table.partition.max' Hive configuration</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="comment">// and defaults to DEFAULT_MAX_PARTITION_BATCH_SIZE if the value is not present in the</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="comment">// Hive configuration.</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c"> 44</a></span>  <span class="keyword">private</span> <span class="keyword">static</span> <span class="keywordtype">short</span> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a> = <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8">DEFAULT_MAX_PARTITIONS_PER_RPC</a>;</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div> |
| <div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keyword">static</span> {</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="comment">// Get the value from the Hive configuration, if present.</span></div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  HiveConf hiveConf = <span class="keyword">new</span> HiveConf(<a class="code" href="classcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsTable.html">HdfsTable</a>.class);</div> |
| <div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  String strValue = hiveConf.get(</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  HiveConf.ConfVars.METASTORE_BATCH_RETRIEVE_TABLE_PARTITION_MAX.toString());</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="keywordflow">if</span> (strValue != null) {</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">try</span> {</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a> = Short.parseShort(strValue);</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  } <span class="keywordflow">catch</span> (NumberFormatException e) {</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  LOG.error(<span class="stringliteral">"Error parsing max partition batch size from HiveConfig: "</span>, e);</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">if</span> (<a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a> <= 0) {</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  LOG.error(String.format(<span class="stringliteral">"Invalid value for max partition batch size: %d. Using "</span> +</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="stringliteral">"default: %d"</span>, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a>, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8">DEFAULT_MAX_PARTITIONS_PER_RPC</a>));</div> |
| <div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  maxPartitionsPerRpc_ = <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8">DEFAULT_MAX_PARTITIONS_PER_RPC</a>;</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  }</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  }</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span> </div> |
| <div class="line"><a name="l00075"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a7d0c63091fbc8b409e31fc7eeffedd38"> 75</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> List<org.apache.hadoop.hive.metastore.api.Partition> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a7d0c63091fbc8b409e31fc7eeffedd38">fetchAllPartitions</a>(</div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  HiveMetaStoreClient client, String dbName, String tblName, <span class="keywordtype">int</span> numRetries)</div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">throws</span> MetaException, TException {</div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  Preconditions.checkArgument(numRetries >= 0);</div> |
| <div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <span class="keywordtype">int</span> retryAttempt = 0;</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">try</span> {</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// First, get all partition names that currently exist.</span></div> |
| <div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  List<String> partNames = client.listPartitionNames(dbName, tblName, (short) -1);</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">return</span> MetaStoreUtil.fetchPartitionsByName(client, partNames, dbName, tblName);</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  } <span class="keywordflow">catch</span> (MetaException e) {</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// Only retry for MetaExceptions, since TExceptions could indicate a broken</span></div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// connection which we can't recover from by retrying.</span></div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">if</span> (retryAttempt < numRetries) {</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  LOG.error(String.format(<span class="stringliteral">"Error fetching partitions for table: %s.%s. "</span> +</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="stringliteral">"Retry attempt: %d/%d"</span>, dbName, tblName, retryAttempt, numRetries), e);</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  ++retryAttempt;</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// TODO: Sleep for a bit?</span></div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">throw</span> e;</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  }</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  }</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  }</div> |
| <div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div> |
| <div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a77bffb14c7c50d8747b869bb8fa369db"> 106</a></span>  <span class="keyword">public</span> <span class="keyword">static</span> List<Partition> <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a77bffb14c7c50d8747b869bb8fa369db">fetchPartitionsByName</a>(</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  HiveMetaStoreClient client, List<String> partNames, String dbName, String tblName)</div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <span class="keywordflow">throws</span> MetaException, TException {</div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  LOG.trace(String.format(<span class="stringliteral">"Fetching %d partitions for: %s.%s using partition "</span> +</div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="stringliteral">"batch size: %d"</span>, partNames.size(), dbName, tblName, <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a>));</div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  List<org.apache.hadoop.hive.metastore.api.Partition> fetchedPartitions =</div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  Lists.newArrayList();</div> |
| <div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  <span class="comment">// Fetch the partitions in batches.</span></div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < partNames.size(); i += <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a>) {</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  <span class="comment">// Get a subset of partition names to fetch.</span></div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  List<String> partsToFetch =</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  partNames.subList(i, Math.min(i + <a class="code" href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">maxPartitionsPerRpc_</a>, partNames.size()));</div> |
| <div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="comment">// Fetch these partitions from the metastore.</span></div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  fetchedPartitions.addAll(</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  client.getPartitionsByNames(dbName, tblName, partsToFetch));</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> fetchedPartitions;</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  }</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html">com.cloudera.impala.util.MetaStoreUtil</a></div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00033">MetaStoreUtil.java:33</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html_a77bffb14c7c50d8747b869bb8fa369db"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a77bffb14c7c50d8747b869bb8fa369db">com.cloudera.impala.util.MetaStoreUtil.fetchPartitionsByName</a></div><div class="ttdeci">static List< Partition > fetchPartitionsByName(HiveMetaStoreClient client, List< String > partNames, String dbName, String tblName)</div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00106">MetaStoreUtil.java:106</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsTable_html"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1catalog_1_1HdfsTable.html">com.cloudera.impala.catalog.HdfsTable</a></div><div class="ttdef"><b>Definition:</b> <a href="HdfsTable_8java_source.html#l00104">HdfsTable.java:104</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html_aeeefb95bd175ad7254f154e2143531c8"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aeeefb95bd175ad7254f154e2143531c8">com.cloudera.impala.util.MetaStoreUtil.DEFAULT_MAX_PARTITIONS_PER_RPC</a></div><div class="ttdeci">static final short DEFAULT_MAX_PARTITIONS_PER_RPC</div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00038">MetaStoreUtil.java:38</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html_a7d0c63091fbc8b409e31fc7eeffedd38"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a7d0c63091fbc8b409e31fc7eeffedd38">com.cloudera.impala.util.MetaStoreUtil.fetchAllPartitions</a></div><div class="ttdeci">static List< org.apache.hadoop.hive.metastore.api.Partition > fetchAllPartitions(HiveMetaStoreClient client, String dbName, String tblName, int numRetries)</div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00075">MetaStoreUtil.java:75</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html_aa35de862ac75d360ba5296e9aad04581"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#aa35de862ac75d360ba5296e9aad04581">com.cloudera.impala.util.MetaStoreUtil.LOG</a></div><div class="ttdeci">static final Logger LOG</div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00034">MetaStoreUtil.java:34</a></div></div> |
| <div class="ttc" id="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil_html_a30d1ffa3284ce8a6e9c04e039fb2fe2c"><div class="ttname"><a href="classcom_1_1cloudera_1_1impala_1_1util_1_1MetaStoreUtil.html#a30d1ffa3284ce8a6e9c04e039fb2fe2c">com.cloudera.impala.util.MetaStoreUtil.maxPartitionsPerRpc_</a></div><div class="ttdeci">static short maxPartitionsPerRpc_</div><div class="ttdef"><b>Definition:</b> <a href="MetaStoreUtil_8java_source.html#l00044">MetaStoreUtil.java:44</a></div></div> |
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