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From Gaojinchao <gaojinc...@huawei.com>
Subject HBaseclient is blocked forever
Date Sat, 17 Dec 2011 06:32:28 GMT
Since the client had a temporary network failure, After it recovered.
I found my client thread was blocked.
Looks below stack and logs, It said that we use a invalid CatalogTracker in function "tableExists".

Block stack:
"WriteHbaseThread33" prio=10 tid=0x00007f76bc27a800 nid=0x2540 in Object.wait() [0x00007f76af4f3000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
         at java.lang.Object.wait(Native Method)
         at org.apache.hadoop.hbase.catalog.CatalogTracker.waitForMeta(CatalogTracker.java:331)
         - locked <0x00007f7a67817c98> (a java.util.concurrent.atomic.AtomicBoolean)
         at org.apache.hadoop.hbase.catalog.CatalogTracker.waitForMetaServerConnectionDefault(CatalogTracker.java:366)
         at org.apache.hadoop.hbase.catalog.MetaReader.tableExists(MetaReader.java:427)
         at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:164)
         at com.huawei.hdi.hbase.HbaseFileOperate.checkHtableState(Unknown Source)
         at com.huawei.hdi.hbase.HbaseReOper.reCreateHtable(Unknown Source)
         - locked <0x00007f7a4c5dc578> (a com.huawei.hdi.hbase.HbaseReOper)
         at com.huawei.hdi.hbase.HbaseFileOperate.writeToHbase(Unknown Source)
         at com.huawei.hdi.hbase.WriteHbaseThread.run(Unknown Source)

In ZooKeeperNodeTracker, We don't throw the KeeperException to high level.
So in CatalogTracker level, We think ZooKeeperNodeTracker start success and
continue to process .

[WriteHbaseThread33]2011-12-16 17:07:33,153[WARN ]  | hconnection-0x334129cf6890051-0x334129cf6890051-0x334129cf6890051
Unable to get data of znode /hbase/root-region-server | org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:557)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
for /hbase/root-region-server
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
         at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:931)
         at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:549)
         at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:73)
         at org.apache.hadoop.hbase.catalog.CatalogTracker.start(CatalogTracker.java:136)
         at org.apache.hadoop.hbase.client.HBaseAdmin.getCatalogTracker(HBaseAdmin.java:111)
         at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:162)
         at com.huawei.hdi.hbase.HbaseFileOperate.checkHtableState(Unknown Source)
         at com.huawei.hdi.hbase.HbaseReOper.reCreateHtable(Unknown Source)
         at com.huawei.hdi.hbase.HbaseFileOperate.writeToHbase(Unknown Source)
         at com.huawei.hdi.hbase.WriteHbaseThread.run(Unknown Source)
[WriteHbaseThread33]2011-12-16 17:07:33,361[ERROR]  | hconnection-0x334129cf6890051-0x334129cf6890051-0x334129cf6890051
Received unexpected KeeperException, re-throwing exception | org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.keeperException(ZooKeeperWatcher.java:385)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
for /hbase/root-region-server
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
         at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:931)
         at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:549)
         at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:73)
         at org.apache.hadoop.hbase.catalog.CatalogTracker.start(CatalogTracker.java:136)
         at org.apache.hadoop.hbase.client.HBaseAdmin.getCatalogTracker(HBaseAdmin.java:111)
         at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:162)
         at com.huawei.hdi.hbase.HbaseFileOperate.checkHtableState(Unknown Source)
         at com.huawei.hdi.hbase.HbaseReOper.reCreateHtable(Unknown Source)
         at com.huawei.hdi.hbase.HbaseFileOperate.writeToHbase(Unknown Source)
         at com.huawei.hdi.hbase.WriteHbaseThread.run(Unknown Source)


[WriteHbaseThread33]2011-12-16 17:07:33,361[FATAL]  | Unexpected exception during initialization,
aborting | org.apache.hadoop.hbase.client.HConnectionManager$HConnectionImplementation.abort(HConnectionManager.java:1351)
org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss
for /hbase/root-region-server
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:90)
         at org.apache.zookeeper.KeeperException.create(KeeperException.java:42)
         at org.apache.zookeeper.ZooKeeper.getData(ZooKeeper.java:931)
         at org.apache.hadoop.hbase.zookeeper.ZKUtil.getDataAndWatch(ZKUtil.java:549)
         at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.start(ZooKeeperNodeTracker.java:73)
         at org.apache.hadoop.hbase.catalog.CatalogTracker.start(CatalogTracker.java:136)
         at org.apache.hadoop.hbase.client.HBaseAdmin.getCatalogTracker(HBaseAdmin.java:111)
         at org.apache.hadoop.hbase.client.HBaseAdmin.tableExists(HBaseAdmin.java:162)
         at com.huawei.hdi.hbase.HbaseFileOperate.checkHtableState(Unknown Source)
         at com.huawei.hdi.hbase.HbaseReOper.reCreateHtable(Unknown Source)
         at com.huawei.hdi.hbase.HbaseFileOperate.writeToHbase(Unknown Source)
         at com.huawei.hdi.hbase.WriteHbaseThread.run(Unknown Source)

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