Details
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Bug
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Status: Open
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Major
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Resolution: Unresolved
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2.4.8
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None
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None
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Issue observed only in hbase 2.4.8
Description
The following bash shell script invocations may stall or not `hbase shell -n` indefinitely (=until timeout). This might be how tty / pipes interact with the hbase shell. Opening this to better understand either if this is a bug or limitation in hbase shell, or what workarounds are there. The below samples and execution is with hbase 2.4.8, whilst in a containerized HBase 2.4.11 the stall issues don't appear.
Works executed in CLI bash
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout 30s bash -c check_alter_hbase
Doesn't work as bash script, stalls until timeout **
# cat stall.sh
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout 30s bash -c check_alter_hbase
# echo $?
124
Running the same bash stall logic in HBase 2.4.11 doesn't seem to reproduce the issue, though there is a slight difference that we have containers there (e.g. pod hbasemaster-0).
Works executed in CLI as bash script
# cat works.sh
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout --foreground 30s bash -c check_alter_hbase
# bash works.sh
Table my_table is ENABLED ...
# echo $?
0
Doesn't work as internal init script, stalls (called indirectly not via CLI)
function check_alter_hbase () {
HBASE_SHELL_CMD="hbase shell -n"
hbase_state=$( echo "describe 'my_table'" | $HBASE_SHELL_CMD )
echo $hbase_state
}
export -f check_alter_hbase
timeout --foreground 30s bash -c check_alter_hbase
Running the same bash stall logic in HBase 2.4.11 doesn't seem to reproduce the issue, though there is a slight difference that we have containers there (e.g. pod hbasemaster-0).